<Spotify AUTHENTICATION SERVICE UNKNOWN_ERROR kotl...

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Spotify AUTHENTICATION SERVICE UNKNOWN_ERROR kotlin android
I am trying authenticate user with spotify app and spotify auth API (implementation 'com.spotify.androidauth2.0.1') followed the steps mentioned in Spotify SDK github sample
my code:
Added in gradle(app.module) defaultConfig { manifestPlaceholders = [redirectSchemeName: "appname", redirectHostName:"spotify_login_callback"] }
// Fragment/Activity

val CLIENT_ID = "7bf56252cd644b339cc97df5b4d7eeee"
val AUTH_TOKEN_REQUEST_CODE = 0x10
val AUTH_CODE_REQUEST_CODE = 0x11

var mAccessToken: String?...