System.UnauthorizedAccessException: Access to the path ‘C:ProgramDataAGA-CADTOOLS 4 BIM’ is denied.
Make sure that your user has all read/write permissions to this folder:
C:ProgramDataAGA-CADTOOLS 4 BIM
Open Properties of this folder:
Select Security tab > Edit your user/User group, and make sure that 'Full Control' is ticked.
After that, restart Revit and the error should disappear.