A
502 Bad Gateway error means that the web server you connected to is acting as a proxy to relay information from another server, but received a bad response from that other server. This is called a 502 error because it is the HTTP status code that the web server uses to describe this type of error. These wrong answers could be due to a number of different causes. It is possible that the server is overloaded or that there are network problems between the two servers, and this is only a temporary problem. It is also possible that there is an improperly configured firewall or even a coding error, and the issue is not resolved until these issues are resolved.
