A 504 Gateway Timeout can make an otherwise working website appear unavailable. If you need to fix 504 Gateway Timeout website issues, the first step is finding out where the delay occurs whether it involves the network, web server, application, PHP-FPM, or database. A 504 error happens when a gateway or proxy waits too long for a response from an upstream server. Fixing the problem is not always about increasing a timeout value. In many cases, the better solution is to ident