java.lang.IllegalStateException: Could not execute method for android:onClick
	at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:414)
	at android.view.View.performClick(View.java:7261)
	at android.view.View.performClickInternal(View.java:7223)
	at android.view.View.access$3800(View.java:824)
	at android.view.View$PerformClick.run(View.java:27721)
	at android.os.Handler.handleCallback(Handler.java:883)
	at android.os.Handler.dispatchMessage(Handler.java:100)
	at android.os.Looper.loop(Looper.java:238)
	at android.app.ActivityThread.main(ActivityThread.java:7824)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:981)
Caused by: java.lang.reflect.InvocationTargetException
	at java.lang.reflect.Method.invoke(Native Method)
	at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:409)
	... 11 more
Caused by: java.lang.NullPointerException: Attempt to read from field 'java.util.List com.entitcs.office_attendance.FaceRecognitionRelated.helpers.MLVideoHelperActivity.recognisedFaceList' on a null object reference
	at com.entitcs.office_attendance.FaceRecognitionRelated.helpers.vision.recogniser.FaceRecognitionProcessor.findNearestFace(FaceRecognitionProcessor.java:247)
	at com.entitcs.office_attendance.FaceRecognitionRelated.helpers.vision.recogniser.FaceRecognitionProcessor.getConfidenceLevel(FaceRecognitionProcessor.java:72)
	at com.entitcs.office_attendance.FaceRecognitionRelated.TakeEmployeePic.onAddFaceClicked(TakeEmployeePic.java:144)
	... 13 more