type mismatch: inferred type is String? but String was expected

[rajada1]

I'm having problems building the APP
I'm using
flutter 2.2.3 stable
dart 2.13.4
msal-flutter 1.0.0+3

C:\src\flutter\.pub-cache\hosted\pub.dartlang.org\msal_flutter-1.0.0\android\src\main\kotlin\uk\co\moodio\msal_flutter\MsalFlutterPlugin.kt: (51, 42): Type mismatch: inferred type is String? but String was expected


* What went wrong:
Execution failed for task ':msal_flutter:compileDebugKotlin'.
> Compilation error. See log for more details

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org