What is the exact error message?
Someone here may be able to help, but not based on zero information
during the upgrade download photoshop froze and I decided to reboot ... then the application fails. Nina does not react that. photoshop works but lightroom dont work
But now there is another problem.Ya remove the application, and now it does not want to re-set
Run CC cleaner tool on your system : Use the Adobe Creative Cloud Cleaner Tool to solve installation problems
Enable root user account : Enabling and using the "root" user in OS X - Apple Support
Download and Install CC app : Download and install Adobe Creative Cloud apps