Stuck on Epic's Login Screen (for Fortnite)

I have been playing successfully with my XBOX Live account linked to Fortnite. Today however, I was no longer able to login. I am stuck on the Epic Login screen after I typed in my Epic credentials. No controller keys work while I'm on that screen. I have to click the XBOX button and get to the main console screen.

I tried to delete the local saved game data and restart the console. but this did not help - the same login screen continues to show and it won't allow any button to work.

Please help.

:)