What means an “Internal Server Error”?
The “Internal Server Error” error message normally indicates a problem with your web server or with the monitored page and there should be additional information in your web server logs. Our monitoring agent is sending the same request every time so it is not very likely that something on our side is triggering this error. A possible reason for this error is that your server requires some HTTP header which is not being sent by our monitoring agent. For example the Accept-language and the Referer headers are not required by default but some of the HTTP servers will respond with an “Internal server error” if they are not provided.
