Photos will not sync to icloud in Catalina
I have about 48,600 photos in my Photos library. Everything synced happily until I upgraded to Catalina. I'm, now at 10.15.1. No syncing. I'm using mainly a 2017 MacBook Pro with 16GB of RAM. I have been on the phone for hours with an Apple tech who has worked diligently to try to figure this out, so far without success. I fear all my work in Photos will be lost, which would be terrible! If anyone else is having a similar problem, or knows of a solution, please share!