· After upgrading my windows 11 Roon bridge software to the newest 2.71 although I see the bridge server has the correct version in the "About" screen I can see no device of bridge server neither the bridge itself in the "Audio" screen so I cannot use bridge devices at all
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· I have a Sercom Speedport Plus 2 router, no switches, no VPN and connect to bridge server via WiFi
Solution: I completely uninstalled Roon Bridge software, I downloaded the latest Roon Bridge software manually and reinstalled it again. It worked!
Very Important: The reinstallation initially failed because a RAAT server file had been left open from previous software and could not be amended. I deleted this file and all the old software remains manually and after the new installation everything was ok.
Thanks for laying out the symptoms clearly. Since the bridge was still showing the right version but was missing from Audio, the most useful next step was a clean reinstall, and your follow-up shows that did the trick.
For future reference, the download page for current Roon installers is here: Download Roon for Mac, Windows, iOS, Android, and ARC. If a reinstall ever fails because a RAAT Server file is still in use, removing the leftover files before reinstalling can matter, just as you found.
Glad you got it working again, and thank you for coming back with the fix.