Hi Pleskians,
yesterday i installed a fresh Debian 9.4 installation to check the new Plesk Onyx 17.8.11. Everything runs fine, except for the error named in title. I really don't know what i can do. I'm not able to activate the Web Application Firewall with the Atomic ModSecurity Ruleset (Free...
I can confirm the above too. The issue still exists.
When i select "Run PHP as FPM application served by nginx" and "PHP version 7.1.6.", click "Save" and reload the page, the "PHP version 5.4 by OS vendor" is selected again.