502 errors
You may see a 502 error with the message Registered endpoints failed to handle the request
 when you try to visit your URL. This means that the request failed, despite the fact that our system thought there was a healthy container at the beginning of the request.
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This often happens because your back-end wasn’t able to respond, when communicating with our proxy servers. You may need to profile your app to determine the cause of this error. Check the Logs tab to potentially find out more information about the issue.