The client 200 is the default client and contains ZBV. Client 100 contains all the other stuff like monitoring. If I drop the sap-client it tries to connect to client 200, that's the reason why.
But could this be the issue? Can you please paste the xml output of the browser, if you call the mobile URL from your webbrowser? (http://yoursolman.yourdomain.tld:8000/sap/opu/odata/AIGW/TECHMON/)