505 error, site not working.

Hello, I can’t properly enter anymore, I get a 505 error: ‘‘505 Bad Gateway’’ ‘‘The server returned an invalid or incomplete response’’. It’s not just my computer, my classmates also can’t see the presentation link I’ve sent them.
Sometimes I am able to see my profile, but when i press edit my prezi, it doesn’t work anymore again.
I kindof need to present tomorrow…