1. Maybe - as you will have gathered - you have to activate/deactivate, so please have a look there:
2. Sometimes, we know in the meantime, the "opm.db file" is the culprit. In this case you should delete it.
3. Did you already try "uninstalling and re-installing"? Be careful with (de)installing aso. by (de)installing by your own resources. As much as I regret it and as strange as it may seem I fear it's a challenge for Adobe's Creative Cloud Cleaner Tool.
Sometimes - for whatever reasons - CC doesn't "want" to work. In this case you should CC completely delete and reinstall by help of Adobe Creative Cloud Cleaner Tool. (A try to uninstall by own resources is not enough!)
I quote: Adobe Creative Suite Cleaner Tool helps resolve installation problems for Adobe Creative Cloud and Adobe Creative Suite (CS3-CS6) applications. The tool removes installation records for prerelease installations of Creative Cloud or Creative Suite applications. It does not affect existing installations of previous versions of Creative Cloud or Creative Suite applications.
Please use: http://helpx.adobe.com/creative-suite/kb/cs5-cleaner-tool-installation-problems.html and follow the prescribed sequence of operations
4. If necessary and for further questions click through http://helpx.adobe.com/contact.html or http://helpx.adobe.com/de/contact.html and if "open" please use chat, I had the best experiences. (I quote from Preran: The chat button is activated as soon as there is an agent available to help.)
Thank you for your fast reply!
Unfortunately I was directed to post on the forum by one of Adobe's staff in a help/chat session so maybe they will not be able to help me.
I have tried your option 1 and 3 of deactivating/reactivating and uninstalling/reinstalling the program using the Adobe CC cleaner tool and neither of those options were able to fix the problem.
In your option 2 you mention deleting the opm.db file. Where is this file found? I did a search in windows explorer and was unable to find the file.
Thank you once again for your assistance.
Mit freundlichen Grüßen
pardon, ich konnte leider nicht früher antworten. (Means something like: Sorry I couldn't answer earlier). Here my "cookbook":
Close the Creative Cloud application if it's running.
Navigate to the OOBE folder.
Windows: [System drive]:\Users\[username]\AppData\Local\Adobe\OOBE
Mac OS: /User/<username>/Library/Application Support/Adobe/OOBE folder
Rename the opm.db file to opm_old.db
Launch Creative Cloud and check.
Normally it works like this. If your problem is still present let us try/I'll try to interest one of the competent persons of Adobe's staff.
I am having the same error and have no success (CS5 Photoshop etc)