client_id
and client_secret
for Website B, instead of those for Website A, in your app.
Alternatively, you might see this if you click the Try Connection button in the on a Connection that contains one of your users. This will execute an authentication flow using the Auth0 global application, but this is not the same as the application you configured in the extension.
You are not allowed to access this application
, most probably there is some conflict with the old rule. Turn off the persistence settings, delete the existing rule, re-enable the settings, and test again.