Cant make a game

Hello here, me and my friend have discover this game and whant to start a big game whit people from my work. we whant to make a casual game whit 24h turn. so i have bought the premium to make it but i get this when i whant to make the game



how to fix that ?

This is also happening to me, but only on Google Chrome. Firefox works fine. I also cleared cache and all but still have problem on Chrome.

This looks exactly like my Error