I can use the sub-categories and sort order to find what I want - awkward, but it works.Then when I click "Add to estimate", I get a popup to select licensing:
You can see it wants me to click a drop-down to pick an option. But the drop-down has no options:
If I click "Add to estimate", I get a response that I have to pick something:
I get a similar response with the other license options. None of them have any contents in the drop-down. And I find the same situation in Firefox, Chrome, and Edge, with my popup blocker disabled, and whether or no I'm logged in.
Oh, while my interest is in the MX105, the Z3C does the same thing: