• Debian 11 is approaching its end-of-life (vendor EOL date - August 31, 2026). Plesk Obsidian 18.0.80 will be 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.

Issue Error. Need help

Olesasan

New Pleskian
Server operating system version
Ubuntu 22.04.5 LTS
Plesk version and microupdate number
18.0.65
533902#0: *4137 FastCGI sent in stderr: "PHP message: Using cached FetchClass file, last modified at: 2026-01-22 12:31:24" while reading response header. How to eliminate this message? Appreciate any assistance.
 
If it's what I'm thinking of, and you're not having any issues with your site, then it's informational and simply letting you know it's using what was cached and can be ignored. If you don't want it showing up in your logs, either update your PHP application or adjust the PHP error reporting to error only.
 
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