What type of pic is it, nude can be in your photo album, but not on your profile

I once tried to put up an ice cream cone and got an alert of any nudity, it was a no go 🙅‍♂ 😅

Yes.it might not let you post a pic ofs its nudity or underwear because your pic is in public view

I've seen that before, but I could just select that was a mistake and the image was fine, and it would set it normally.

The only obvious thing that comes to mind is perhaps your settings.

Check the age range in your settings.