The "502 Bad Gateway" error message can be customized by each website. While this isn't very common, keep in mind that this error may present itself in more ways than the common ones listed below:
"502: Bad Gateway"
"502 - Service Temporarily Overloaded"
"HTTP Error 502 - Bad Gateway"
The 502 Bad Gateway error displays inside the Internet browser window, just as web pages do.
The 502 Bad Gateway error is an HTTP status code that means that one server received an invalid response from another server that it was accessing while attempting to load the web page or fill another request by the browser.
The 502 Bad Gateway error is usually a network error between servers on the Internet, meaning the problem is not with your PC or Internet connection. Even though the issue is not yours to troubleshoot or resolve, there are a few things you can do:
Retry the web page by clicking the refresh/reload button or trying the URL from the address bar again. Even though the 502 Bad Gateway error is reporting a networking error outside of your control, the error may only be temporary. Trying the page again will often be successful.
Come back later. Since the 502 Bad Gateway error message is an issue with the web site's network, everyone visiting this site is probably experiencing the same problem as you. Chances are an issue like that has already been brought to the attention of an administrator at the web site and someone is working to resolve it.
If you can't wait any longer for the problem to be resolved or if you'd like to help out, you may want to attempt to contact the webmaster or another website contact yourself and advise them of the 502 Bad Gateway error you are receiving. The webmaster of most Internet sites can be reached via email at firstname.lastname@example.org, replacing website.com with the actual website name.