BigSur, Catalyst: failed authentication via [OIDAuthState authStateByPresentingAuthorizationRequest:presentingViewController:callback:]

OIDAuthState fails authorization on BigSur, Catalyst.

[OIDAuthState authStateByPresentingAuthorizationRequest:presentingViewController:callback:] fails with the following error:
Error Domain=org.openid.appauth.general Code=-3 "(null)" UserInfo={NSUnderlyingError=0x6000001b9d40 {Error Domain=com.apple.AuthenticationServices.WebAuthenticationSession Code=1 "(null)"}}

Expected behavior
[OIDAuthState authStateByPresentingAuthorizationRequest:presentingViewController:callback:] should work on Big Sur, Catalyst.

Desktop (please complete the following information):

• MacOS Big Sur 11.0 Beta (20A5384c)
• Browser chrome, Safari

Additional context
The is NOT reproducible on iOS and Mac OS 10.15.6

The issue can be reproduced with AppAuth example "Example-iOS_ObjC" if use custom clientID and use configuration for Google:

• (OIDServiceConfiguration *)configurationForGoogle {
  NSURL *authorizationEndpoint =
  [NSURL URLWithString:@"https://accounts.google.com/o/oauth2/v2/auth"];
  NSURL *tokenEndpoint =
  [NSURL URLWithString:@"https://www.googleapis.com/oauth2/v4/token"];

  OIDServiceConfiguration *configuration =
  [[OIDServiceConfiguration alloc] initWithAuthorizationEndpoint:authorizationEndpoint
  tokenEndpoint:tokenEndpoint];
  return configuration;
  }

Start by reproducing the failure with the Example-iOS_ObjC example, the custom Google configuration, and OIDAuthState authStateByPresentingAuthorizationRequest:presentingViewController:callback: on Big Sur Catalyst. Compare behavior with iOS and macOS 10.15.6; done means authorization succeeds on Big Sur Catalyst without regressing those working platforms.