HTTP 504 Error: What it is and how to fix it

The HTTP 504 error is a status code that indicates a timeout occurred while waiting for a response from a server. This error is usually caused by an overloaded or slow server, or issues with network connectivity. When a client sends a request to a server, it expects a response within a certain time frame. If the server takes longer than the specified time to respond, a 504 error is returned to the client.