HTTP Status Codes - Online Reference Guide
Reference guide for HTTP status codes. Learn the meaning of 200, 404, 500, and all HTTP codes.
Bad Gateway
The server, acting as a gateway or proxy, received an invalid response from the upstream server.
Common Causes
Upstream server is down, misconfigured, overloaded, or returning malformed responses.
How to Fix
Check if the upstream server is running and accessible. Verify proxy/gateway configuration. Check upstream server logs.
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