DllNotFoundException: CadExCore

I've just downloaded and added your Asset into my project running Unity 2021.3.10f1 and I get this error:

DllNotFoundException: CadExCore assembly: type: member:(null)
cadex.CadExCorePINVOKE+SWIGExceptionHelper..cctor () (at :0)
Rethrow as TypeInitializationException: The type initializer for 'SWIGExceptionHelper' threw an exception.
cadex.CadExCorePINVOKE..cctor () (at :0)
Rethrow as TypeInitializationException: The type initializer for 'cadex.CadExCorePINVOKE' threw an exception.
cadex.LicenseManager.Activate (System.String theKey) (at :0)
cadimport.ImportCadData (System.String file, System.Boolean importpmi, System.String quality, System.Single angulardeflection, System.Single chordaldeflection, System.Single scale) (at <77c6c9bfbfbce1f89629dbf4fedd24eb>:0)
game4automation.CADLink.ImportCadData () (at Assets/game4automation/CADLink/private/CADLink.cs:316)
game4automation.CADLink.ImportCad () (at Assets/game4automation/CADLink/private/CADLink.cs:176)

When I click on "Import CAD File"...

I'm running macOS 12.6

Thanks

Stuart