I’m in same boat, it really frustrating I lost 1800 asset after update. I manage to figure out that is problem is the file being read-only for me keeps asking this /4/ZK/NBTUPFQL0LOY69XKW5W0WR.uasset’. Is the file in use or read only. I revert them back, but it keeps happening again and again. I don’t know what else to do.