Overview
The following error occurred during Omeka S operation.
This same issue was reported in the following forum.
https://forum.omeka.org/t/session-name-is-not-a-valid-sessions-related-ini-setting/15499
Cause and Solution
This appears to occur with the combination of Omeka S version 3.x and PHP 8.1.
The issue here is PHP 8.1 specifically. You won’t see it on 8.0 or older versions. An upcoming release of Omeka S will resolve this problem with PHP 8.1, but I don’t have a date currently set on when that will release.
This information is from 2022, so for example, upgrading to a newer version of Omeka S as of 2024 can resolve this issue.
Summary
I hope this serves as a helpful reference for Omeka S operation.