502 bad gateway InfinityFree

I’m getting an 502 bad gateway error on all InfinityFree pages (except this forum). When I want to login I will get a bad gateway error, also all other subpages on the homepage will get the error too.

I almost can login again. But now when I log in I see the error message “Oops that wasn’t supposed to happen.” So I don’t know what’s going on here… Someone else got these problems too?