Tried to use the command method to rollback a 3.8 file to 3.7, but I kept getting this error and not seeing my new .json.
Any help on this? Also, it seems like the Skeleton Viewer just refuses to open a .json I have and even Spine examples, even if exported from the matching version (3.8.76).
*Edit: Okay, I tried with another 3.8 animation, and it rolled back to 3.7 perfectly. So, I am assuming there's an issue with the first .json's setup within the Editor that's preventing rollback.
*Edit 2: Aaaaaand, I isolated the problem with one of my skins simply having no attachment... So it seems like I have to make sure no error reports appear during Export (except Slot visibility, cuz that seems to cause no problem).