Github Page 404 error persists after I hour

Hello,

I have published my webpage over an hour ago and I am still getting a 404 error. 

Usually it takes 2 to 10 minutes. Could you help with that? 

Link to the repository- https://github.com/CharlesIvia/tic-tac-toe

Link to the site -https://charlesivia.github.io/tic-tac-toe/