Crash in SDK: 'int android.media.AudioTrack.getPlaybackHeadPosition()' on a null object reference

stacktrace:
java.lang.NullPointerException: Attempt to invoke virtual method 'int android.media.AudioTrack.getPlaybackHeadPosition()' on a null object reference
at com.deezer.sdk.player.impl.NativePlayerImpl$ClassicRock.onMarkerReached(Unknown Source)
at android.media.AudioTrack$NativeEventHandlerDelegate$1.handleMessage(AudioTrack.java:1578)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5951)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1388)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)