Local Push Notifications - Unrecognized selector sent to instance

I'm hitting the following issue with Katzer's Local Push Notification plugin I have installed:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFNumber isEqualToString:]: unrecognized selector sent to instance 0x16d7aae0'

It's crashing my app now a few seconds after load.

I've looked at this open issue but nothing seems to work.

Has any one managed to fix this or found another plugin to do local push?

Thanks.