- Plesk Onyx for Linux
Why is it not possible to upgrade Plesk with Plesk Multi Server installed to the Plesk Onyx 17.8?
Why is Plesk Multi Server not supported in Plesk Onyx 17.8?
Plesk XML API has been significantly reworked and improved in Plesk Onyx 17.8, and is no longer compatible with Plesk Multi Server.
It was decided to postpone updating Plesk Multi Server to make it compatible with the latest Plesk XML API.
For the moment, Plesk versions supported Multi Server are Plesk Onyx 17.0 and Plesk Onyx 17.5.
Follow this article or look at the Plesk Change Log for any change regarding Multi Server support.