Cannot upload map


I am very very new to modding for Ark. I am following a simple tutorial for adding a basic “map” mod, and everything works great until the “Upload to Steam” part.

The cook works fine but the Upload button is greyed out. I have done a bit of google, but nothing seems to be working :frowning: Any help would be appreciated!

(The test image is 50kb in size)

Thank you very any/all help!