"Unknown Server Error" when logging in to Creative Cloud

When you try to log in to a Creative Cloud application after updating the CC Desktop application, you receive an "Unknown Server Error" message.

This page offers solutions to fix this error. Try the solutions in order; stop when you're able to log in without receiving an error message.

Solution 1: Update to the latest version of the Creative Cloud Desktop app
Solution 2: Clean up cached user login information
Solution 3: Reinstall the Creative Cloud Desktop app and clean up cached user login information

The CC Desktop application version 1.0.0.183 and later include an update that resolves this issue for most users. In most cases, Creative Cloud downloads and installs the update automatically when you sign in. If you're unable to sign in from the Creative Cloud Desktop application, then do the following:

1. Visit http://www.adobe.com/creativecloud/desktop-app.html.
2. Sign in with the Adobe ID associated with your Creative Cloud account - click the Sign In link at the upper-right corner of the page and follow onscreen instructions. 
3. Download and install the latest version of the Creative Cloud Desktop application - click the Download button at the upper-right corner of the page and follow onscreen instructions.
4. Launch the Creative Cloud Desktop application and sign in.

1. Close the Creative Cloud Desktop application.
2. Navigate to the OOBE folder.
   Windows: [System drive]:\Users\[user name]\AppData\Local\Adobe\OOBE
   Mac OS: /Users/[user name]/Library/Application Support/Adobe/OOBE
   
3. Delete the opm.db file.
4. Launch the Creative Cloud Desktop application.

1. Uninstall the Creative Cloud Desktop application. 
   • Windows
   1. Open the Windows Control Panel > Programs And Features.
   2. Choose Adobe Creative Cloud and click Uninstall/Change.
   3. Follow the onscreen instructions.
   • Mac OS
   1. Open Finder and go to /Applications/Utilities/Adobe Installers.
   2. Double-click Adobe Creative Cloud to remove.
   3. Follow onscreen instructions.
2. Repeat the steps from Solution 2 to clean up cached user login information.
3. Repeat the steps from Solution 1 to reinstall the latest version of the Creative Cloud Desktop application.
4. Launch the Creative Cloud Desktop application.

If the OOBE folder is not visible in the specified location, change your system settings to allow hidden files and folders to be displayed.

Show hidden files, folders, filename extensions | Windows XP, Vista, Windows 7, 8
Access hidden user library files | Mac OS 10.7 and later