We are aware of some issues on macOS Catalina related to file access and security and are working to resolve this problem.
We have seen some suggest a workaround that involves using Terminal commands to get Roon to work. We strongly advise against this as this will prevent your Roon database from working properly once our Catalina issues are resolved.
We appreciate your patience as we continue to work on a fix for this.
Roon tell me that this is not a good workaround since it can cause problems when you want to return to the standard user mode of running Roon. I dont know the details, just that I was told not share this workaround.