The CoachIndexPage uses the AuthenticationWrapper component to show state if a user does not have permissions to view the page they are on. Because of uncaught errors during state loading, this never gets displayed if one is navigating directly to a quiz creation route, as seen below:

1. When my session has ended while I've been editing a quiz then I am brought back to the sign-in page where I can sign in as a learner user in which case I am redirected back to the quiz editing page and since I don't actually have permissions to see it I am getting a blank screen:

Originally posted by @pcenov in #12414 (comment)