I made a copy of my livery and before I knew it every reskin was gone. (It did show the save error message). 2nd time it happened and it puts all PS reskinners at risk of losing the work they've spent countless hours on. I hope this is fixed before spirit of steam.
Reported this issue way back. Happened to me alot luckily I had it saved in my cloud but times I didn't which I had to start everything from scratch. There's a thread about it made earlier today go check it out.
It’s a know issue since the livery editor came out and DTG is aware and are trying to figure it out what’s the problem. Until the fix comes out I suggest to not copy any livery anymore and do a backup on the cloud or a USB stick in case of an error message which means all the hard work vanished