[MacOS] PlatformExeption: Failed to aquire root FlutterViewController

[edeuss]

Describe the bug

Getting a PlatformExeption from running FlutterWebAuth2.authenticate on a mac.

Device (please complete the following information!)

• Device: Macbook Pro
• OS: MacOS V12.6
• flutter_web_auth_2 version: 1.1.2

Code

try {
      final result = await FlutterWebAuth2.authenticate(
        url:
            "https://example.com",
        callbackUrlScheme: "example",
      );
} catch (error) {
      print(error);
}

[ThexXTURBOXx]

The full error message is missing.
Also, please try to apply the fixed Andrei and I noted in #9

[ThexXTURBOXx]

I tagged this PR as being part of Hacktoberfest.
So, if someone is able to fix and properly test this issue, he is one step closer to completing Hacktoberfest 2022 :)

[jonasbark]

For me, it always happens when the Flutter app is not in the foreground while attempting to run authenticate.
E.g. launch the app, put it in the background, then call authenticate => crash

[Adam-Langley]

Also fixed by e899192

[ThexXTURBOXx]

@Adam-Langley Thanks for letting me know! In case someone has more problems with this, I can reopen the issue!