502 Bad Gateway Error: What it means and how to fix it

502 Bad Gateway is an HTTP status code that indicates that a server acting as a gateway or proxy received an invalid response from an upstream server. In other words, the server that is attempting to fulfill the request received an invalid response from another server that it was trying to access on behalf of the client. This can occur due to a variety of reasons, such as server overload, network congestion, or a server outage.