firebase-messaging - Fatal: failed to find callback

Question

I\'m trying to use FCM messaging and keep getting this error.

E/FlutterFcmService( 3684): Fatal: failed to find callback

Below is the code I\'ve

Answer 1

This error message is coming from startBackgroundIsolate which is used for allowing handling background messages. If you don't want to handle background messages then you can safely ignore this error message. Otherwise, you need to set up a callback for handling background messages as described here

If your callback is not executed when clicking on the notification then it's because you didn't set click_action property of the message to FLUTTER_NOTIFICATION_CLICK