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via vuforia.com by Unknown author, 1 year ago
Attempt to invoke virtual method 'void java.util.concurrent.locks.ReentrantLock.lock()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'void java.util.concurrent.locks.ReentrantLock.lock()' on a null object reference	at com.qualcomm.VuforiaMedia.VideoPlayerHelper.unload(VideoPlayerHelper.java:343)	at com.unity3d.player.UnityPlayer.nativeRender(Native Method)	at com.unity3d.player.UnityPlayer.a(Unknown Source)	at com.unity3d.player.UnityPlayer$b.run(Unknown Source)