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:3169)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3304)
	at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
	at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2013)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loop(Looper.java:211)
	at android.app.ActivityThread.main(ActivityThread.java:7234)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:503)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:887)
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(Unknown Source:18)
	at com.entitcs.office_attendance.signup_activities.Signup_Option.onCreate(Unknown Source:55)
	at android.app.Activity.performCreate(Activity.java:7283)
	at android.app.Activity.performCreate(Activity.java:7274)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1272)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3149)
	... 11 more