[OK. edited version]
With R80.30 Cloud Demo it works also with interacting smxProxy. So I was able to do 'show-tags' and 'show-unused-objects'.
After upgrade the SmartCenter from R80.20M2 to R80.30 the Extension loads, I see the context - but I'm not able to
issue 'show-tags'. I noticed that the context did not contain the SID.
Also tried to reach an internal API, but "Tried to acquire resource from an unauthorized URL" in the Debug logs. The API is on the same domain. So how to reach a API and with which restrictions?
Alex