Sorry about the late response. Please make sure have your antivirus deactivated and check the Squeezebox Server’s debug for further information. Also make sure you have your filesystem expanded in the Settings/Reboot menu. We could access the advanced options for the upnpbridge in our tester, so it should be possible for the RPi 2/3. Please make sure you select the binary „armv6hf“ once you can access the advanced options.