When uploading UGC, specifically Layered Clothing, I often experience the error message reading “Missing HSR data for ItemName.WrapLayer. Please try again.”
It seems other creators have been experiencing this error for quite some time, but I don’t see an official bug report for it and it’s been ongoing for quite some time now.
Here is a picture of the error message.
Copying and pasting the asset into a different Roblox studio instance solves the issue and it lets you upload the item fine. No modifications had to be made to the item itself.