LogoutResponse Redirect Not Working

[GlenWarren]

Hi,

I'd like to redirect the user back to the login page after logging out, rather than to a blank screen: redirect(/) presumably.

As instructed in the docs here: https://laravel.com/docs/9.x/fortify#customizing-authentication-redirects
I have added the following code to App\Providers\FortifyServiceProvider:

use Laravel\Fortify\Contracts\LogoutResponse;
 
/**
 * Register any application services.
 *
 * @return void
 */
public function register()
{
    $this->app->instance(LogoutResponse::class, new class implements LogoutResponse {
        public function toResponse($request)
        {
            return redirect('/login');
        }
    });
}

But it is not working.

I have also tried a number of other redirects, such as:
return redirect()->route('platform.main');
return redirect()->route('platform.login');
return redirect('/admin/login');

But basically, it's not even reaching this code. This file is registered correctly.

Any advice?