java.lang.NullPointerException: Attempt to invoke virtual method 'void androidx.activity.ComponentActivity.onBackPressed()' on a null object reference at com.entitcs.office_attendance.CRM.pb$n.onClick(Unknown Source:9) at androidx.appcompat.app.AlertController$g.handleMessage(Unknown Source:37) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:176) at android.app.ActivityThread.main(ActivityThread.java:6651) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:824)