Encountering a 502 Bad Gateway error can be frustrating for both website users and administrators, as it disrupts access to the website. A 502 Bad Gateway error specifically indicates that a server acting as a gateway or intermediary, like a reverse proxy server, has received an invalid response from an upstream server (often the main server hosting the content).
This error often arises when there is a miscommunication between servers and understanding the underlying causes can help in pinpointing the exact issue.