Access to the path 'TOOLS 4 BIM’ is denied
Problem
'System.UnauthorizedAccessException: Access to the path ‘C\:ProgramData\AGA-CAD\TOOLS 4 BIM’ is denied' error is visible

Solution
Make sure that your user has all read/write permissions to the folder C:\ProgramData\AGA-CAD\TOOLS 4 BIM:
Open Properties of the folder:

Select 'Security tab' > Edit your User/User group, and make sure that 'Full Control' is ticked
Restart Revit. The error should disappear
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