Users have reported issues when trying to load a plugin into GarageBand
A recent update in macOS & GarageBand security policies required an update of our products.
Even with this update, and while awaiting for a fix on macOS side, the first instantiation of our products will need an internet connection so that they can be validated by Apple.
After the first instantiation, you will be able to use your plugins offline in GarageBand.
NOTE: This issue will reappear after updating a plugin.