Hey @mrk0per when you're on the page, press holding CTRL key and then press F5 (so CTRL + F5), which will clear the page cache for that specific page and refresh the page. I got the same error you're seeing, then did CTRL + F5, and it then worked. Although all my progress in the game was gone... so that might be a bigger, different issue!
Regardless, this appears to be game-side / game-server issues, so please reach out to the developers (support is linked in that Clear Your Cache error message!) for similar, future problems, as Armor is unable to fix game-side issues.