You should contact Innuos about how to get access to the Roon files so you can delete the Tidal account file or how to do a clean reinstall of Roon on your server (I hope you have a backup before doing so). Read also:
Our team has been tracking an issue where Tidal accounts are becoming corrupt and causing issues like endless loading or audio devices missing. If you’re experiencing any of these issues, please follow the steps below to delete the tidal_account file.
The team is working on a permanent solution to this issue, but this workaround should get you back up and running in the meantime. Please note that you’ll need to sign back into Tidal in Roon after doing this.
If you’re still seeing issues after …
Remember to ALWAYS shut down your Roon Core before copying, moving, or accessing your Roon database. macOS Core Open Finder and click Go in the top bar Hold down the Option key (or Alt)(⌥) to unhide the Library folder Click the Library...
The relevant section from the last document is: