Troubleshoot a 502 Bad Gateway Error

his guide details the "502 Bad Gateway" type errors that one can get while visiting a website.

Origin of the error

The 502 Bad Gateway error occurs when the server that acts as a gateway between the browser and the originating web server receives an invalid response. This error can be caused by an overloaded web server, communication issues between a CDN and the hosting web server, or a misconfigured proxy server. Sometimes the error can be caused by a bad entry in the DNS server.

Ways to solve

To solve the 502 Bad Gateway error, it is often necessary to proceed by elimination:

• check if it is not a temporary overload of the server: just reload the page after a few minutes for the error to disappear
• clear browser cache
• try from another browser