Unable to create Investigation in GUS

I've been able to use the bot successfully to generate Bugs and User Stories successfully in GUS. I'm now trying to create Investigations, and am using the INVESTIGATION P1, INVESTIGATION P2, etc labels, but it's failing to create the GUS records. It's trying, but comes back with an error: "Error while creating work item!" I can successfully create an Investigation directly in GUS with the designated product tag.

Our config.json looks like this:

{
"productTag": "a1aAH00000004MRYAY",
"defaultBuild": "DOCe-Pilot",
"hideWorkItemUrl": "true"

}