There might be a problem with the user's computer or network.There might be any number of basic configuration errors, especially in the server's firewall, designed to prevent malware and intrusions by hackers. The server's firewall or other settings are misconfigured.Because browsers find websites using a DNS server lookup, this can cause a 504 error until the update is complete. If the website's server recently changed IP address, it might take some time for the DNS server address to update. There was a recent IP address or DNS server change.Most websites are hosted on servers maintained by third-party providers, and if the server is offline because of a hardware problem or maintenance, it might generate a 504 error. There is a server connectivity problem.If there's a problem between any two devices, it can result in a 504 error. It takes many network connections to successfully show a website in your browser, including modems, routers, network switches, cabling, and more. There are a lot of possible root causes - here are the most common ones: When you see a 504 gateway timeout error, the overall problem is pretty easy to understand, but that simple explanation doesn't explain why the timeout error is happening.
