android.media.MediaCodec$CryptoException: Error decrypting data: requested key has not been loaded

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android.media.MediaCodec$CryptoException: Error decrypting data: requested key has not been loaded	at android.media.MediaCodec.native_queueSecureInputBuffer(Native Method)	at android.media.MediaCodec.queueSecureInputBuffer(MediaCodec.java:2292)	at com.google.android.exoplayer.MediaCodecTrackRenderer.feedInputBuffer(MediaCodecTrackRenderer.java:644)	at com.google.android.exoplayer.MediaCodecTrackRenderer.doSomeWork(MediaCodecTrackRenderer.java:460)	at com.google.android.exoplayer.ExoPlayerImplInternal.doSomeWork(ExoPlayerImplInternal.java:431)	at com.google.android.exoplayer.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:213)	at android.os.Handler.dispatchMessage(Handler.java:98)	at android.os.Looper.loop(Looper.java:148)	at android.os.HandlerThread.run(HandlerThread.java:61)	at com.google.android.exoplayer.util.PriorityHandlerThread.run(PriorityHandlerThread.java:40)