Gson Sometimes byte_array sometimes byte_object error need both please help

Android
1

val request:okhttp3.Request = okhttp3.Request.Builder().url(url).build()

    val client = OkHttpClient()

    client.newCall(request).enqueue(object : Callback {
        override fun onResponse(call: Call, response: okhttp3.Response) {
            val body = response?.body?.string()
            println(body)
            val jsonStr = XML.toJSONObject(body).toString()
            println(jsonStr)
            val gson = GsonBuilder().create()

            val homeFeedSchools = gson.fromJson(jsonStr, HomeFeedSchools::class.java)


            /*runOnUiThread {
                recyclerView_SchoolList.adapter = SchoolsAdapter(homeFeedSchools)
            }*/

        }

        override fun onFailure(call: Call, e: IOException) {
            println("error")
        }
    })
}

}

data class HomeFeedSchools(
@SerializedName(“municipality”)
val municipality: Municipality? = null
)
data class Municipality(
@SerializedName(“name”)
val name: String? = null,
@SerializedName(“schools”)
val schools: Schools? = null,
@SerializedName(“xmlns:i”)
val xmlnsI: String? = null
)
data class Schools(
@SerializedName(“schoolInfo”)
var schoolInfo: List ===========> this is source of error

)
data class SchoolInfo(
@SerializedName(“id”)
val id: String? = null,
@SerializedName(“name”)
val name: String? = null,
@SerializedName(“schoolUrl”)
val schoolUrl: String? = null
)