Retrofit unable to resolve host

Android
2

I solved it by adding this code to the manifest.xml file

  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />


   android:usesCleartextTraffic="true"

Then chased I found that Retrofit was unable to resolve the url with the VPN so everything worked with the ip address
and finally I modified the call in the interface

from so

    @GET("Clients")
    fun getClients(): Call<ClientList>

to

    @GET("Clients/")
    fun getClients(): Call<ClientList>