Can't add image to marketplace listing

[Katerina Kirax]

Hello - I am trying to create some listings to offload some gacha items.  The first one I worked on, I was able to upload an image from my hard drive.  However, any subsequent listening I try to work on does not have that ability.  Where has it gone?  How do I get it back?  What am I doing wrong?  I made a gyazo of scrolling up and down the screen so you can see that the option is missing.  Help! Thanks in advance!

 

https://gyazo.com/2162e4a8fdd873603952718cbd501ccc