We have released an important update (UAD v9.12.1 and later) that resolves an issue that can prevent UAD plug-ins from authorizing properly on macOS 10.15 Catalina. Please download and install this update as soon as possible.
The following dialog can be displayed on some macOS Catalina systems:
"UAD [plug-in name] cannot be authorized. One or more UAD devices is incompatible with this version of the UAD plug-ins software."
The "UAD plug-in cannot be authorized" dialog
Download and install UAD v9.12.1 (or later) software.