Error: type 'FlutterError' is not a subtype of type 'String'

[Leo]

Hi, I'm getting this error on v1.2.2:

E/flutter (16962): [ERROR:flutter/lib/ui/ui_dart_state.cc(166)] Unhandled Exception: type 'FlutterError' is not a subtype of type 'String'
E/flutter (16962): #0      ProgressDialog.hide (package:progress_dialog/progress_dialog.dart:119:18)
E/flutter (16962): #1      restoreDataFromFile (package:my_grand_kids/managers/backups_manager.dart:427:33)

This is what I have on backups_manager.dart:427:
if (context != null) await pr.hide();
where pr is a ProgressDialog.

What could that be?

[Haaris Ahamed]

I am also getting the above error