If reinstalling didn’t change it, check whether Opera’s updater service is actually running correctly. On Windows, look in Services for the Opera scheduled update services and make sure they aren’t disabled. A firewall, antivirus, proxy, or DNS filter can also block the update check while the browser itself still works normally. Since you’re a developer, checking Opera’s updater logs would probably be the most useful next step. If the update service is running but never gets a response, that should narrow it down pretty quickly. 😚