Ftutter v2.8.1

[Savdancode]

I got this error on my exist project can you help to fix it?

../../../Dev/flutter/.pub-cache/hosted/pub.dartlang.org/another_flushbar-1.12.29/lib/flushbar.dart:350:31: Error: Method 'addPostFrameCallback' cannot be called on 'SchedulerBinding?' because it is potentially null.

• 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart' ('../../../Dev/flutter/packages/flutter/lib/src/scheduler/binding.dart').
  Try calling using ?. instead.

[cmdrootaccess]

#81