I am facing an error

[diptoroy]

I am seeing library documentation but facing this error. What can I do? can anybody help me? Thank you

here is my error from logcat
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.movieapp, PID: 31520
java.lang.RuntimeException: java.lang.Exception: Preparation/playback error (1): Unknown error
at com.halilibo.bvpkotlin.BetterVideoPlayer.throwError(BetterVideoPlayer.kt:1049)
at com.halilibo.bvpkotlin.BetterVideoPlayer.onError(BetterVideoPlayer.kt:858)
at android.media.MediaPlayer$EventHandler.handleMessage(MediaPlayer.java:3441)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: java.lang.Exception: Preparation/playback error (1): Unknown error
at com.halilibo.bvpkotlin.BetterVideoPlayer.onError(BetterVideoPlayer.kt:858) 
at android.media.MediaPlayer$EventHandler.handleMessage(MediaPlayer.java:3441) 
at android.os.Handler.dispatchMessage(Handler.java:106) 
at android.os.Looper.loop(Looper.java:223) 
at android.app.ActivityThread.main(ActivityThread.java:7656) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)