Keep getting logged out!

Hey can someone please help me, I have two factor authentication on, and I have changed my password 4 times and somehow I keep getting logged out of my account. It says ‘failed to login’ or ‘account logged in elsewhere’. I can’t play save the world without getting kicked from the game after ten minutes and I can’t even join a battle royale game without this message coming up ‘error occurred, restart client’. SOMEONE HELP PLEASE

From the contents of the post, I assume this is Fortnite … please use the Fortnite forums: