Did you ever figure out the issue? I'm running into a similar issue unfortunately.
My application is also crashing when I attempt to run the Import Contingent Values tool. And now any effort I make to reproduce the table into a test/production table also crashes the application.
Turned out my application was crashing because I needed to address some data hygiene issues in my CSVs. The trouble was not related to the absence of subtypes...
Hi @JoshuaLogsdon1 - I am trying the same thing and I have only made small progress so far.
I see you have mentioned that you're not using a subtype, I'd still suggest having the subtype and subtype_name. Use the value "0" for the subtype and leave the subtype_name blank. Do you have the CV_TYPE2 and so on for the other domains? With the above importing contingent values was successful, however, got an error "Found contingent value error for field group" and was not able to save it.