Unable to execute Advanced Arcmap Settings, after installing ArcGIS Desktop 10.8, anyone have any idea to resolve
Not sure what you are trying to do but Utility Network doesn't work with ArcMap its only ArcGIS Pro
This error is due to BUG-000129099 in ArcGIS Desktop 10.8. There is no workaround for the issue, except to backtrack to 10.7.1 or another earlier version. A solution has been arrived at and will be available when 10.8.1 is released.