Crashes when starting a new activity using kotlin

[dayanithi06]

I tried with extending AppCompactActivity it works. But with nucleusappcompactactivity crashes.

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dayanithi.supercamping/com.dayanithi.supercamping.activities.admin.AdminLoginClass}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2760)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2821)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1541)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:181)
at android.app.ActivityThread.main(ActivityThread.java:6295)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:793)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
at android.content.ContextWrapper.getResources(ContextWrapper.java:86)
at android.view.ContextThemeWrapper.getResourcesInternal(ContextThemeWrapper.java:127)
at android.view.ContextThemeWrapper.getResources(ContextThemeWrapper.java:121)
at android.support.v7.app.AppCompatActivity.getResources(AppCompatActivity.java:542)
at android.view.Window.getDefaultFeatures(Window.java:1627)
at android.view.Window.(Window.java:668)
at com.android.internal.policy.PhoneWindow.(PhoneWindow.java:333)
at com.android.internal.policy.PhoneWindow.(PhoneWindow.java:341)
at android.app.Activity.attach(Activity.java:6797)