I just upgrade React-native from 0.28 to 0.30, and get this error:
\"Native module cannot be null\".
The problem seem to be with the line/package:
if it helps someone. Manual link the library in node_modules/react-native/libraries/PushNotificationIOS/RCTPushNotification.xcodeproj for ios https://facebook.github.io/react-native/docs/linking-libraries-ios#manual-linking
that's where the manual linking refers to. not react-native-push-notification