Upload mod Problem

Hi! I have just made a lot of changes to the existing map, Ragnarok and was trying to upload it to the steam workshop when i ran in to a problem. I hope you guys can help me since i am new to unreal engine.
I have cooked the map as a “Island Extension” (took forever)
Logged in to my steam account to be able to upload.
Gave it a name and a description.
Then i pressed “Upload”

Later when i am checking my uploaded mods on steam workshop, i see that i have uploaded something but not what it is or anything (see picture)

So what am i doing wrong here?