java.lang.RuntimeException: Unable to start activity ComponentInfo{com.entitcs.office_attendance/com.entitcs.office_attendance.signup_activities.Signup_Option}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.IBinder android.view.View.getWindowToken()' on a null object reference
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2320)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2380)
	at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3932)
	at android.app.ActivityThread.access$900(ActivityThread.java:151)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1291)
	at android.os.Handler.dispatchMessage(Handler.java:102)
	at android.os.Looper.loop(Looper.java:135)
	at android.app.ActivityThread.main(ActivityThread.java:5289)
	at java.lang.reflect.Method.invoke(Native Method)
	at java.lang.reflect.Method.invoke(Method.java:372)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.IBinder android.view.View.getWindowToken()' on a null object reference
	at com.entitcs.office_attendance.h.b.a(SourceFile)
	at com.entitcs.office_attendance.signup_activities.Signup_Option.onCreate(SourceFile)
	at android.app.Activity.performCreate(Activity.java:6018)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2273)
	... 11 more