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.
The Roon Support Team