Have you seen the 504 Gateway Timeout Error when entering your WordPress website? This error can prevent users from accessing your site. What's more, if the problem is not resolved, it may go away on its own and reappear. What is the 504 Gateway Timeout Error? A 504 Gateway Timeout Error occurs when the main server of the website that handles the user's request to open a page does not get a fast response from the upstream server. The upstream server may be busy or handling high traffic, causing the delay. The part...