App Crashing on login

So I have re-branded the app and submitted it to Google Play but get the following error:

Any idea how to fix this?

java.lang.NoClassDefFoundError

in com.networkstudios.app.LoginActivity.<init>

java.lang.NoClassDefFoundError: com.networkstudios.app.LoginActivity$1
at com.networkstudios.app.LoginActivity.<init>(LoginActivity.java:37)
at java.lang.Class.newInstanceImpl(Native Method)
at java.lang.Class.newInstance(Class.java:1319)
at android.app.Instrumentation.newActivity(Instrumentation.java:1068)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2007)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2117)
at android.app.ActivityThread.access$700(ActivityThread.java:134)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1218)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4867)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1007)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:774)
at dalvik.system.NativeStart.main(Native Method)

I would assume that you've didn't renamed everything properly, please check if location of LoginActivity (and other classes) was changed to src/com/networkstudios/app

Have you tested it on your Android device before submitting to Google Play? Did everything worked out?

Have you tested both signed and unsigned apk?