A chat session where an agent may remotely look inside your computer may help
Creative Cloud chat support (all Creative Cloud customer service issues)
Thank you, Arpit !
I already tried Solution 1 multiple times with no success.
But Solution 2 WORKED! Lightroom CC gave me error 16 after renaming SLCache and SLStore and I had to reinstall it, but now IT WORKS!
Glad to hear that the issue got resolved.
Thanks for the confirmation.