How do I get the SWSD app for Teams to prompt for a sub-category, when creating a new ticket?

I was just watching the Quick Byte, "SolarWinds Service Desk – MS Teams Integration," and it shows the app prompting for a sub-category.  When I select a category, I then get messages like "There is no sub-category available."

Can you first check in Service Desk that there are subcategories nested underneath the parent category you're selecting? The only time this should show is if there have not been subcategories created in the Setup section.

documentation.solarwinds.com/.../categories.htm

Within the past hour, I've discovered that I do get the sub-category prompt for two of our populated categories, being "Advice/Help..." and "User Account..."  However, when I go to use either "Software..." or "Hardware..." I'm back to the "There is no sub-category available" message.

Each of our categories - with the exception of "undefined" - have two or more sub-categories.  Is there some kind of limitation?

Okay, so it only appears to be our "Software..." and "Hardware..." categories that the Teams app reports as having no sub-categories available.  That's progress.  I'm now reviewing the doc you're pointing to, hboyd...