Can't sign in due to unknown server error

Last updated on Oct 17, 2025

Learn how to resolve the unknown server errors when signing in to your Creative Cloud apps.

After updating the Creative Cloud desktop app, you might see an "Unknown Server Error" message when signing in to a Creative Cloud app. Follow these solutions to fix the issue.

Creative Cloud desktop app is outdated

The more recent versions of the Creative Cloud desktop app include an update that usually resolves this issue, and downloading the latest version of the app can fix the issue.

Go to the Creative Cloud download page and select Download Creative Cloud.

Double-click the downloaded file to begin installation:

macOS: Creative_Cloud_Installer.dmg
Windows: Creative_Cloud_Set-Up.exe

Follow the on-screen instructions to complete your installation.

After the installation, sign in to your apps again.

Cached information is causing issues

Close all Creative Cloud apps.

Navigate to the following folder:

On Windows: C:\Users\[username]\AppData\Roaming\Adobe\OOBE
On macOS: /Users/[username]/Library/Application Support/Adobe/OOBE/

Delete the opm.db file.

Restart your computer.

Launch the Creative Cloud desktop app and sign in again.

Note

If you can’t see the OOBE folder in the specified location, change your system settings to show hidden files and folders. Learn how to see hidden files and folders in Windows and macOS.

Creative Cloud desktop app installation is causing issues

Uninstall the Creative Cloud desktop app.

Clean up cached user login information.

Install the latest version of the Creative Cloud desktop app.

Launch the Creative Cloud desktop app and sign in again.

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