• Debian 11 has reached its end-of-life (vendor EOL date - August 31, 2026). Plesk Obsidian 18.0.81 is the last release to support it.
    If you are running Plesk Obsidian on Debian 11, we recommend you upgrade those servers to Debian 12 using our dist-upgrade tool.
  • We plan to deprecate and remove the support for XML RPC protocol versions earlier than 1.6.9.1 in Plesk Obsidian 18.0.82. We strongly recommend that you update all existing integrations using earlier versions of the XML RPC protocol to comply with the version 1.6.9.1 specification.

Plesk 10.4.4 The license key is invalid.

I'm using Plesk 10.4.4 on CentOS 5.x 64 bit on a Virtuozzo VPS container, with auto updates on through my hosting provider Openhost.

I received an automated panel notifcation email stating:

Unable to update . An error occurred while processing your key. You can try updating it later.

Now when I log in, I receive an error message.

Error: The license key is invalid.

I've checked several threads on here, and none of them provide a solution that works for me.

I'm on Linux, so the Plesk for Windows issue with corrupted data in a mySQL table shouldn't apply, but I checked anyway, and that looks fine.


The option to retrieve keys is greyed out, as is roll back key.

I'm offered the choice of a 14 day trial mode, but I'm wary of doing this in case it breaks things further.
I pay my hosting provider for Plesk as part of the VPS package, however they say they'll charge me for investigating since it's a VPS, so I'm asking here in the hopes I might be able to find a solution.
 
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