java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.unFocus(android.view.View)' on a null object referenceat android.view.ViewGroup.removeViewInternal(ViewGroup.java:5480)

at android.view.ViewGroup.removeViewAt(ViewGroup.java:5443)

at com.mx.video.MXVideo$3.invoke(MXVideo.kt:193)

at com.mx.video.MXVideo$3.invoke(MXVideo.kt:164)

at com.mx.video.utils.MXValueObservable.set(MXValueObservable.kt:23)

at com.mx.video.MXVideo.switchToScreen(MXVideo.kt:462)

at com.mx.video.MXVideo$Companion.gotoNormalScreen(MXVideo.kt:40)

at net.pengtu.syblite.ui.ExtractActivity.onBackPressed(ExtractActivity.kt:72)

at net.demo.ui.VideoActivity.onBackPressed(ExtractActivity.kt:72)