clarkwinkelmann Anime7s what's the url and what's your setup ? If this is your FreeFlarum forum (as I strongly suppose because it's indeed returning a 504 error to me as well), there's nothing we can do. You may try contacting FreeFlarum support via their email.
OrdinaryJellyfish Anime7s FreeFlarum seems to be having problems currently, I'd recommend contacting them through their email as clarkwinkelmann stated and waiting for @Sanguine to post more about this.
Anime7s yes it's FreeFlarum, i was facing this error for hour and since FreeFlarum is hosting site i couldn't do anything about it i will try contacting support
Sanguine See https://discuss.flarum.org/d/7585-free-flarum-hosting-on-an-expert-platform-by-freeflarum-com/660