crpb
All three services are running just fine when the problem occurs.
When I then try to login to the MGM interface again, I am getting the error:
JSON.parse: unexpected character at line 1 column 1 of the JSON data
Also WebApp etc. won't load anymore.
Error 504 - Gateway Timeout
The 504 (Gateway Timeout) status code indicates that the server, while acting as a gateway or proxy, did not receive a timely response from an upstream server it needed to access in order to complete the request.