- Plesk for Linux
- Plesk for Windows
In an attempt to activate Plesk main license via Plesk > Tools & Settings > License Management > Install Key > Enter an activation code the following error appears:
PLESK_ERROR: Automatic upgrade for this license is not possible. Please contact your reseller. (Error code: 2)
An incorrect activation key is used.
Contact Licensing and Purchase support to obtain the correct activation key.