Please refer to:
You are no longer signed into your Creative Cloud applications
Re: Creative Cloud keeps logging me out
This is the step-by-step procedure
1: Open Activity monitor from spotlight and end all Adobe related processes. You may find processes like AAMupdater, AAMupdater notifier, Adobe Crash demon process.
2: Open a Finder window, select Go>Go to folder option, type in ~/Library and hit enter.
3: Now navigate to Application Support/Adobe/OOBE/.. folder.
4: Delete opm file under OOBE.
5: Rename OOBE to OOBEold.
6: Check if you have AAMupdater in the same location.
7: Please rename it to AAMupdaterold.
8: Click on gear icon on Creative Cloud desktop app and choose Quit Creative Cloud.
9: Then launch it, sign-in and click on Apps tab.
Hope it helps you.