I am trying to use the Roon ARC app. When I open the app it shows "time for an update" Roon server cannot connect with this version of ARC. Please update your Roon Server to reconnect"
Diagnostics indicate that your ROCK has been updated to the latest production build. If you’re still seeing this message in ARC, then fully close the app, connect to your home network on the phone, and reboot RoonServer itself before opening ARC again,
If that doesn’t work, the more heavy-handed step would be reinstalling the app. Unfortunately, this will require you to redownload any local content to the phone that you’ve saved for offline use in ARC. However, it will overwrite any erroneous cached data.