- Plesk Onyx
- Plesk was upgraded from Plesk 11.0.9 to Plesk Onyx.
While trying to retrieve the license key at Plesk > Tools and Settings > License management > Retrieve Keys the following error appears:
PLESK_ERROR: Error: The version of your installed software is 17.5 for Unix/Linux, but the current license version is 11.0-11.6 for Unix/Linux. Upgrades from 11.0-11.6 for Unix/Linux to 17.5 for Unix/Linux are not available for this license.
The key was purchased for Plesk 11 and needs to be upgraded in order to use it on newer versions.