I removed PHP5 from being the default PHP version on debian 8 server. I used update-alternatives to change it. Even though every site is setup on ISPCONFIG to use the Additional PHP versions I still can't get the sites up.
ISPCONFIG panel still down. Probably because. 000-ispconfig.vhost has: Code: fastcgi_pass unix:/var/lib/php5-fpm/ispconfig.sock;
Do not change the default PHP version of distribution, will break ISPConfig. If you want to have a recent PHP version for system, upgrade distribution (Although Debian 8 has LTS support until mid. 2020, but the software is very outdated). -> Go back to system version with update-alternatives to PHP5. Install PHP7 (if needed) via additional versions and change Websites to these additional versions: https://www.howtoforge.com/tutorial...fig-3-from-debian-packages-on-debian-8-and-9/