Yet Another Case of Missing Camera Profiles

I do not use camera profiles often. But occasionally, I have a job that requires me to use custom X-Rite Color-Checker Passport profiles. Has always worked flawlessly until now. 

My profiles should be listed under Profiles ... directly beneath Camera Matching, but they are not and there seems to be NO way to import them because when I try to import one ... I receive this message:

I seem to receive this message because all of my profiles are still in their proper location and seemingly imported, but hidden. I've tried duplicating, renaming to a new name and importing from a different location ... no change. 

I work from a "working" catalog. When I am finished with a shoot ... it is exported as a catalog and archived. The most recent catalog I exported and archived from a shoot for this client was in August of 2018. When I open that catalog ... what do you know ... I can see ALL of my profiles. So ... I tried importing the catalog into my working catalog. When I select a RAW file captured yesterday ... there are STILL no custom profiles listed ... but when I select a RAW file imported from old catalog ... I see ALL of the profiles.

I also tried importing yesterday's images into the old catalog ... no change.

Selections available for RAW files captured yesterday 

Selections available for 2018 RAW files

So ... I tried syncing ... does not copy the camera profile to new images!

I uninstalled, removed all preference and reinstalled ... no change!

I am beyond frustrated at this point ... I've wasted over two hours trying to do something that should have taken less than 10 seconds.