Java runtime exception

I am using APDE on my OnePlus 5 android 8 when I tried building an example from your library examples, I get this error.

java.lang.RuntimeException: Unable to pause activity {processing.test.sample/processing.test.sample.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.opengl.GLSurfaceView.queueEvent(java.lang.Runnable)' on a null object reference

Kindly help me with this issue.