Publishing Kotlin/Multiplatform to Maven Central with ./gradlew publishAllPublicationsToSonatypeRepository: failed for task ':buffer:publishJsPublicationToSonatypeRepository'

Hi I am publishing for my first time to Maven Central using maven-publish and signing plugins. I can logon to https://s01.oss.sonatype.org. I have also published my GPG key and setup my local.properties file. When I publish with./gradlew publishAllPublicationsToSonatypeRepository --stacktrace it crashes in the middle of: :buffer:publishJsPublicationToSonatypeRepository

Has anyone had problems with publishing the JS part of a KMP project?

Gets this error Could not PUT 'https://s01.oss.sonatype.org/service/local/staging/deploy/maven2/angelos-project-buffer/buffer-js/unspecified/buffer-js-unspecified.pom'. Received status code 400 from server: Bad Request

Repo misconfiguration or maybe build.gradle.kts misconfiguration or else?

Stacktrace:

* What went wrong:
Execution failed for task ':buffer:publishJsPublicationToSonatypeRepository'.
> Failed to publish publication 'js' to repository 'sonatype'
   > Could not PUT 'https://s01.oss.sonatype.org/service/local/staging/deploy/maven2/angelos-project-buffer/buffer-js/unspecified/buffer-js-unspecified.pom'. Received status code 400 from server: Bad Request

* Try:
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':buffer:publishJsPublicationToSonatypeRepository'.
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.lambda$executeIfValid$1(ExecuteActionsTaskExecuter.java:145)
        at org.gradle.internal.Try$Failure.ifSuccessfulOrElse(Try.java:282)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeIfValid(ExecuteActionsTaskExecuter.java:143)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:131)
        at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:77)
        at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46)
        at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:51)
        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57)
        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56)
        at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:77)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:55)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:199)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:73)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:52)
        at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:74)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:402)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:389)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:382)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:368)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.lambda$run$0(DefaultPlanExecutor.java:127)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:191)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:182)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:124)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
        at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
        at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:61)
Caused by: org.gradle.api.artifacts.PublishException: Failed to publish publication 'js' to repository 'sonatype'
        at org.gradle.api.publish.internal.PublishOperation.run(PublishOperation.java:46)
        at org.gradle.api.publish.maven.tasks.PublishToMavenRepository.doPublish(PublishToMavenRepository.java:113)
        at org.gradle.api.publish.maven.tasks.PublishToMavenRepository.publish(PublishToMavenRepository.java:85)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:104)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.doExecute(StandardTaskAction.java:58)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:51)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:29)
        at org.gradle.api.internal.tasks.execution.TaskExecution$2.run(TaskExecution.java:239)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:29)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:26)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.run(DefaultBuildOperationRunner.java:47)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:68)
        at org.gradle.api.internal.tasks.execution.TaskExecution.executeAction(TaskExecution.java:224)
        at org.gradle.api.internal.tasks.execution.TaskExecution.executeActions(TaskExecution.java:207)
        at org.gradle.api.internal.tasks.execution.TaskExecution.executeWithPreviousOutputFiles(TaskExecution.java:190)
        at org.gradle.api.internal.tasks.execution.TaskExecution.execute(TaskExecution.java:168)
        at org.gradle.internal.execution.steps.ExecuteStep.executeInternal(ExecuteStep.java:89)
        at org.gradle.internal.execution.steps.ExecuteStep.access$000(ExecuteStep.java:40)
        at org.gradle.internal.execution.steps.ExecuteStep$1.call(ExecuteStep.java:53)
        at org.gradle.internal.execution.steps.ExecuteStep$1.call(ExecuteStep.java:50)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:199)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:73)
        at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:50)
        at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:40)
        at org.gradle.internal.execution.steps.RemovePreviousOutputsStep.execute(RemovePreviousOutputsStep.java:68)
        at org.gradle.internal.execution.steps.RemovePreviousOutputsStep.execute(RemovePreviousOutputsStep.java:38)
        at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:48)
        at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:36)
        at org.gradle.internal.execution.steps.CancelExecutionStep.execute(CancelExecutionStep.java:41)
        at org.gradle.internal.execution.steps.TimeoutStep.executeWithoutTimeout(TimeoutStep.java:74)
        at org.gradle.internal.execution.steps.TimeoutStep.execute(TimeoutStep.java:55)
        at org.gradle.internal.execution.steps.CreateOutputsStep.execute(CreateOutputsStep.java:51)
        at org.gradle.internal.execution.steps.CreateOutputsStep.execute(CreateOutputsStep.java:29)
        at org.gradle.internal.execution.steps.CaptureStateAfterExecutionStep.execute(CaptureStateAfterExecutionStep.java:61)
        at org.gradle.internal.execution.steps.CaptureStateAfterExecutionStep.execute(CaptureStateAfterExecutionStep.java:42)
        at org.gradle.internal.execution.steps.BroadcastChangingOutputsStep.execute(BroadcastChangingOutputsStep.java:60)
        at org.gradle.internal.execution.steps.BroadcastChangingOutputsStep.execute(BroadcastChangingOutputsStep.java:27)
        at org.gradle.internal.execution.steps.BuildCacheStep.executeWithoutCache(BuildCacheStep.java:188)
        at org.gradle.internal.execution.steps.BuildCacheStep.lambda$execute$1(BuildCacheStep.java:75)
        at org.gradle.internal.Either$Right.fold(Either.java:175)
        at org.gradle.internal.execution.caching.CachingState.fold(CachingState.java:59)
        at org.gradle.internal.execution.steps.BuildCacheStep.execute(BuildCacheStep.java:73)
        at org.gradle.internal.execution.steps.BuildCacheStep.execute(BuildCacheStep.java:48)
        at org.gradle.internal.execution.steps.StoreExecutionStateStep.execute(StoreExecutionStateStep.java:38)
        at org.gradle.internal.execution.steps.StoreExecutionStateStep.execute(StoreExecutionStateStep.java:27)
        at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:36)
        at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:22)
        at org.gradle.internal.execution.steps.SkipUpToDateStep.executeBecause(SkipUpToDateStep.java:109)
        at org.gradle.internal.execution.steps.SkipUpToDateStep.lambda$execute$2(SkipUpToDateStep.java:56)
        at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:56)
        at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:38)
        at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:73)
        at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:44)
        at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:37)
        at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:27)
        at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:89)
        at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:50)
        at org.gradle.internal.execution.steps.ValidateStep.execute(ValidateStep.java:114)
        at org.gradle.internal.execution.steps.ValidateStep.execute(ValidateStep.java:57)
        at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.execute(CaptureStateBeforeExecutionStep.java:76)
        at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.execute(CaptureStateBeforeExecutionStep.java:50)
        at org.gradle.internal.execution.steps.SkipEmptyWorkStep.lambda$execute$2(SkipEmptyWorkStep.java:93)
        at org.gradle.internal.execution.steps.SkipEmptyWorkStep.execute(SkipEmptyWorkStep.java:93)
        at org.gradle.internal.execution.steps.SkipEmptyWorkStep.execute(SkipEmptyWorkStep.java:34)
        at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsStartedStep.execute(MarkSnapshottingInputsStartedStep.java:38)
        at org.gradle.internal.execution.steps.LoadPreviousExecutionStateStep.execute(LoadPreviousExecutionStateStep.java:43)
        at org.gradle.internal.execution.steps.LoadPreviousExecutionStateStep.execute(LoadPreviousExecutionStateStep.java:31)
        at org.gradle.internal.execution.steps.AssignWorkspaceStep.lambda$execute$0(AssignWorkspaceStep.java:40)
        at org.gradle.api.internal.tasks.execution.TaskExecution$3.withWorkspace(TaskExecution.java:284)
        at org.gradle.internal.execution.steps.AssignWorkspaceStep.execute(AssignWorkspaceStep.java:40)
        at org.gradle.internal.execution.steps.AssignWorkspaceStep.execute(AssignWorkspaceStep.java:30)
        at org.gradle.internal.execution.steps.IdentityCacheStep.execute(IdentityCacheStep.java:37)
        at org.gradle.internal.execution.steps.IdentityCacheStep.execute(IdentityCacheStep.java:27)
        at org.gradle.internal.execution.steps.IdentifyStep.execute(IdentifyStep.java:44)
        at org.gradle.internal.execution.steps.IdentifyStep.execute(IdentifyStep.java:33)
        at org.gradle.internal.execution.impl.DefaultExecutionEngine$1.execute(DefaultExecutionEngine.java:76)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeIfValid(ExecuteActionsTaskExecuter.java:142)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:131)
        at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:77)
        at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46)
        at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:51)
        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57)
        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56)
        at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:77)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:55)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:204)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:199)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:53)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:73)
        at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:52)
        at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:74)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:402)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:389)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:382)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:368)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.lambda$run$0(DefaultPlanExecutor.java:127)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:191)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:182)
        at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:124)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
        at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
        at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:61)
Caused by: org.gradle.internal.resource.transport.http.HttpErrorStatusCodeException: Could not PUT 'https://s01.oss.sonatype.org/service/local/staging/deploy/maven2/angelos-project-buffer/buffer-js/unspecified/buffer-js-unspecified.pom'. Received status code 400 from server: Bad Request
        at org.gradle.internal.resource.transport.http.HttpResourceUploader.upload(HttpResourceUploader.java:44)
        at org.gradle.internal.resource.transfer.DefaultExternalResourceConnector.upload(DefaultExternalResourceConnector.java:79)
        at org.gradle.internal.resource.transfer.ProgressLoggingExternalResourceUploader$UploadOperation.run(ProgressLoggingExternalResourceUploader.java:98)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:29)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:26)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:66)
        at org.gradle.internal.operations.DefaultBuildOperationRunner$2.execute(DefaultBuildOperationRunner.java:59)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:157)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:59)
        at org.gradle.internal.operations.DefaultBuildOperationRunner.run(DefaultBuildOperationRunner.java:47)
        at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:68)
        at org.gradle.internal.resource.transfer.ProgressLoggingExternalResourceUploader.upload(ProgressLoggingExternalResourceUploader.java:44)
        at org.gradle.internal.resource.transfer.AccessorBackedExternalResource.put(AccessorBackedExternalResource.java:133)
        at org.gradle.api.publish.maven.internal.publisher.AbstractMavenPublisher$ModuleArtifactPublisher$1.run(AbstractMavenPublisher.java:279)
        at org.gradle.api.internal.artifacts.repositories.transport.NetworkOperationBackOffAndRetry.withBackoffAndRetry(NetworkOperationBackOffAndRetry.java:50)
        at org.gradle.api.publish.maven.internal.publisher.AbstractMavenPublisher$ModuleArtifactPublisher.putResource(AbstractMavenPublisher.java:276)
        at org.gradle.api.publish.maven.internal.publisher.AbstractMavenPublisher$ModuleArtifactPublisher.publish(AbstractMavenPublisher.java:232)
        at org.gradle.api.publish.maven.internal.publisher.AbstractMavenPublisher$ModuleArtifactPublisher.publish(AbstractMavenPublisher.java:225)
        at org.gradle.api.publish.maven.internal.publisher.AbstractMavenPublisher.publish(AbstractMavenPublisher.java:85)
        at org.gradle.api.publish.maven.internal.publisher.MavenRemotePublisher.publish(MavenRemotePublisher.java:61)
        at org.gradle.api.publish.maven.internal.publisher.ValidatingMavenPublisher.publish(ValidatingMavenPublisher.java:50)
        at org.gradle.api.publish.maven.tasks.PublishToMavenRepository$1.publish(PublishToMavenRepository.java:111)
        at org.gradle.api.publish.internal.PublishOperation.run(PublishOperation.java:43)
        ... 120 more

Do you have success with publishing other artifacts and only JS one is failing, or the JS one just happens to be first published and thus failing first?

There’s an important first step to publishing to sonatype — getting their approval for the artifact group you’re gonna use. Have you created a ticket in their tracker for that? (as this guide recommends: OSSRH Guide - The Central Repository Documentation)
An example of such ticket: https://issues.sonatype.org/projects/OSSRH/issues/OSSRH-81226

Do you have success with publishing other artifacts and only JS one is failing, or the JS one just happens to be first published and thus failing first?

Seems like JS one is the first one being uploaded.

There’s an important first step to publishing to sonatype…

I have placed a ticket. Verified my artifact group by TXT DNS record.

What I did was following this tutorial for publishing to MavenCentral for KMP → Publishing your Kotlin Multiplatform library to Maven Central - DEV Community

I also adapted the code snippets related to it, so I assume the Kotlin toolchain will do some things for me. I put it in buildSrc.

import org.gradle.api.publish.maven.MavenPublication
import org.gradle.api.tasks.bundling.Jar
import org.gradle.kotlin.dsl.`maven-publish`
import org.gradle.kotlin.dsl.signing
import java.util.*

plugins {
    `maven-publish`
    signing
}

// Stub secrets to let the project sync and build without the publication values set up
ext["signing.keyId"] = null
ext["signing.password"] = null
ext["signing.secretKeyRingFile"] = null
ext["ossrhUsername"] = null
ext["ossrhPassword"] = null

// Grabbing secrets from local.properties file or from environment variables, which could be used on CI
val secretPropsFile = project.rootProject.file("local.properties")
if (secretPropsFile.exists()) {
    secretPropsFile.reader().use {
        Properties().apply {
            load(it)
        }
    }.onEach { (name, value) ->
        ext[name.toString()] = value
    }
} else {
    ext["ossrhUsername"] = System.getenv("OSSRH_USERNAME")
    ext["ossrhPassword"] = System.getenv("OSSRH_PASSWORD")
    ext["signing.keyId"] = System.getenv("SIGNING_KEY_ID")
    ext["signing.password"] = System.getenv("SIGNING_PASSWORD")
    ext["signing.secretKeyRingFile"] = System.getenv("SIGNING_SECRET_KEY_RING_FILE")
}

val javadocJar by tasks.registering(Jar::class) {
    archiveClassifier.set("javadoc")
}

fun getExtraString(name: String) = ext[name]?.toString()

publishing {
    // Configure maven central repository
    repositories {
        maven {
            name = "sonatype"

            // Repository URL for snapshot deployment and download access:
            //setUrl("https://s01.oss.sonatype.org/content/repositories/snapshots/")

            //Repository URL for release deployment, no download access! :
            setUrl("https://s01.oss.sonatype.org/service/local/staging/deploy/maven2/")

            credentials {
                username = getExtraString("ossrhUsername")
                password = getExtraString("ossrhPassword")
            }
        }
    }

    // Configure all publications
    publications.withType<MavenPublication> {

        // Stub javadoc.jar artifact
        artifact(javadocJar.get())

        // Provide artifacts information requited by Maven Central
        pom {
            name.set("Buffer for Angelos Project™")
            description.set("A data-buffer made to be used without old legacy, in a modern asynchronous environment. With all necessary fundaments.")
            url.set("https://angelos-project.com")

            licenses {
                license {
                    name.set("MIT")
                    url.set("https://opensource.org/licenses/MIT")
                }
            }
            developers {
                developer {
                    id.set("kristoffer-paulsson")
                    name.set("Kristoffer Paulsson")
                    email.set("kristoffer@angelos-project.com")
                }
            }
            scm {
                url.set("https://angproj.org/angelos-project-buffer")
            }

        }
    }
}

// Signing artifacts. Signing.* extra properties values will be used

signing {
    sign(publishing.publications)
}

Finally got it to work. Had to overlook all the code from tutorials and compare to newer examples from Sonatype, and check other Kotlin projects that publishes.

Then I came up with this solution: