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.
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
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.
Sanguine See https://discuss.flarum.org/d/7585-free-flarum-hosting-on-an-expert-platform-by-freeflarum-com/660