I use Desktop app. Today I am unable to complete/enter the Outfit challenge. The challenge screen where I would select male or female avatar only allows me to cancel. The screen doesn't even look like the screen looked yesterday.

Top of screen says: Start challenge

And this is what follow:
Costume_4
(Requirements are the Usual)
Description:: Costume _Description_4
Setting: Costume_Location_4
Costume_Room_4

The Gem Event has now been fixed, please clear your cache and refresh your game if you are not seeing the fixed entry pop up