Between last night and this morning all of my Creative Cloud "My work" photos disappeared. They can still be found in "Assets", but not through CC desktop (mobile is a whole other problem which I've spent hours on the line with Adobe about). When I woke up the computer this morning the Apple "Beach ball" was spinning and a message said that CC was taking a long time to sync. I waited for a few minutes that I did a force quit. This problem has affected a lot of people over the years. Luckily I am an amateur photographer and not a pro like these other folks seem to be. Adobe said theyy had its engineers working on this problem since 2015, but I haven't seen anything in the ASC threads that showed that it was actually solved for anyone! I've already looked in my trash can (one idea Adobe had, assuming it was caused by user error). I also looked in the CC archive folder which didn't have the files.
If you have already performed the steps as suggested and still issue persists, please contact Adobe Support Team so that they can take the Coresync Log files and share the logs with Engineering Team to resolve the issue.