Last night I was working on a trinket mod pack. I was uploading project.xml without issues every 20 minutes or so while making edits. I try it again later that night, and everything loads, but there is an unhandled error. Everything loads and it says it is going to submit, but fails.

Thought it would work today. Nope. Cleared my Steam download cache. Still doesn't work. Double checked all my files, which work perfectly fine with a manual install.

Could someone please help me? This is getting very disheartening and is making this project more trouble than I want to handle, even though it's like 95% done. Project.xml stopped uploading properly as soon as I made some important changes to my trinkets, but there seems to be nothing I can change to fix this issue.