If you moved your libraries to an external SSD to save space, the pointer might be broken. Go to > Libraries/Paths inside EZdrummer 3.

The Toontrack Product Manager application may fail to authorize, download, or link the library correctly.

Note: The ProgramData folder is hidden by default on Windows. You may need to click on the "View" tab in File Explorer and check the box for "Hidden items" to see it. Open Finder and check the following default paths: /Library/Application Support/Toontrack/EZdrummer/ /Users/[Your Username]/Documents/Toontrack/

Mac users frequently face this error after updating macOS due to tightened security settings. Open on your Mac. Navigate to Privacy & Security > Files and Folders .