Because of a small bug in the current version of Debian Linux, libicu might not get included with the default installation even though it should. If your Roon Bridge disappears right after the latest update, it’s because the service won’t start without libicu. Run this from the command line:
sudo apt install libicu76
Restart the service. Back in business. No further action required. The current version of Debian meets all the other minimum requirements. Big thank you to mjw for a more accurate solution.
mjw
(You want nice, supportive? Call a damn helpline.)
2
You shouldn’t need the dev package. Simply install libicu76 for Trixie. BTW, it is installed with cifs-utils.
Bookworm users may have the same issue. For those users, libicu76 is not available in the package repositories and an earlier version of libicu is required.
From what I can determine, Bookworm package repositories originally provided libicu72 but, if it is available, libicu74 would be preferable.
Try libicu74 (sudo apt install libicu74) and if that does not work, libicu72 (sudo apt install libicu74). One of these should definitely work.