I was GMing a campaign I created and it suddenly became unresponsive. I refreshed the page and tried to reconnect to the game. After signing out and back in the campaign was no longer listed in My Campaigns. I asked my players for a link to the game but when I clicked on it, I received the message "Not Authorized". My players can still access the campaign but it's nowhere to be found for me.
If I had to guess as to what the problem is, I'd say the game thinks I never left and so trying to reenter under the same username is making it unhappy.