java.lang.IllegalArgumentException: View=DecorView@79e9402[FaceTrackerActivity] not attached to window manager
	at android.view.WindowManagerGlobal.findViewLocked(WindowManagerGlobal.java:551)
	at android.view.WindowManagerGlobal.removeView(WindowManagerGlobal.java:455)
	at android.view.WindowManagerImpl.removeViewImmediate(WindowManagerImpl.java:216)
	at android.app.Dialog.dismissDialog(Dialog.java:530)
	at android.app.Dialog.dismiss(Dialog.java:512)
	at c4.a0$a.f1(Unknown Source:5)
	at c4.a0$a.onPostExecute(Unknown Source:2)
	at android.os.AsyncTask.finish(AsyncTask.java:771)
	at android.os.AsyncTask.-$$Nest$mfinish(Unknown Source:0)
	at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:788)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loopOnce(Looper.java:223)
	at android.os.Looper.loop(Looper.java:324)
	at android.app.ActivityThread.main(ActivityThread.java:8630)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:582)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1061)