Hallo! I have 2 websites running exactly the same software (they are a copy of each other) and they are both running with letsencrypt certificate: the original (production site) and a testing site (copy of production), running PHP 5.4.45 under FASTCGI. I'm using Debian 8 and ISPConfig latest version. The only difference is the production site is also running under cloudflare and the test site not. I followed the guide: "How to install PHP 7.1, 7.2 and 5.6 as PHP-FPM & FastCGI for ISPConfig 3 on Debian 9" to install PHP 5.6.X in my server (Debian 8). Everything went smoothly. Then went to test the new version of PHP in the test site and it run without any problems: tried both, FASTCGI and PHP-FPM and they worked just fine. Then I went to switch the php version on the production site and got a critical error. I tried on both, FASTCGI and PHP-FPM. I event got this message: "Database connection error (2): Could not connect to MySQL.Database connection error (2): Could not connect to MySQL.Database connection error (2): Could not connect to MySQL.Database connection error (2): Could not connect to MySQL." I couldn't dig to much because I had to switch back to the old PHP version because the site was down. I don't understand how this is possible. Can it be because ISPConfig didn't store the configuration properly for the production site? What can I do? Thanks in advance.