Laravel 11 guest re-direct not working

I'm working on a Laravel 11 project using the Spatie Roles & Permissions package for user roles and permissions.

When a guest user tries to access a route which is for authenticated users the expected re-direct to the login page does not occur instead the '403 USER IS NOT LOGGED IN' page is shown instead. Is the re-direct not automatically done with L11?

I tried adding :-

$middleware->redirectGuestsTo( fn( Request $request ) => route( 'login' ) );

to the config/app.php withMiddleware() section but it had no effect.

Is there something I have missed?

TIA!