Category Not Working?

Is anyone having a problem entering a category from the dropdown in Creator today when publishing? If I skip it, prompt wants it to be added, but it won’t fly. Using Edge, I tried Fun and Nature. Neither worked.
I’m going to try another computer, but in the meantime I thought I’d ask if others are having a problem, too.

(BTW, my publish previews still do not display accurately, but that was reported in another topic.)

Edit: Seems to be working now. So is the Preview. Same browser/same PC. Bizarre!