Security Folder

A lot of third party apps need access to the drive to do whatever it is they're supposed to do. Catalina automatically presumes any such third party app is up to no good unless you tell it otherwise.

Open the System Preferences and click on Security & Privacy. Click the Privacy tab. Click the lock and enter your admin password so you can add items.

Scroll down to Full Disk Access in the left column (or whatever service the app needs). Add your apps to the right column.