Hey all, I decided to have a crack at making a map for Ratz, but whenever I attempt to upload it to the workshop, as soon as it goes onto the "Uploading Workshop Content" popup it immediately fails. I tried uploading a new map and sure enough, the same problem occurs.

I have no clue what's causing this to happen, as I've very easily been able to upload workshop content for TF2 issue free, so if anybody has a clue what causes this issue that would be greatly appreciated!