Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
We value your experience with Plesk during 2025 Plesk strives to perform even better in 2026. To help us improve further, please answer a few questions about your experience with Plesk Obsidian 2025. Please take this short survey: https://survey.webpros.com/
It has several flaws, one of them being failure to check that session.save_path value is a default one for a given OS (or in other way restrict potential adverse effects of changing permissions).
Just fix your /tmp permissions. It restricts itself to running only once, so don't worry.
I can confirm this issue. We have seen /tmp permissons changed on all Plesk 10.4 machines after MU #41 was installed. Again a wonderful example of the lack of testing at Parallels.
Worth noting that we use /tmp as PHP's session.save_path instead of the default value.