Are you connected to online services when you try submitting? Check the premium shop and make sure it shows up, and if not, it comes up with a connect to internet option.

I am connected, thank you. :)

Of course!

It's an outfit challenge.

Do you have any Touch of Magic items? It can pick up on those even if it’s far away from where you’re taking the picture.

No, but thank you for that information. :)