After upgrading Ubuntu from 16.04 to 18.04 (LTS) ISPConfig died! going to my server console I get Internal Server Error All my services seem to have started and the mail seem to work well I guess this has to do with the php changes to 7.xx All my hosted sites report ERROR 500 - Internal Server Error! WebMail does not come up BUT phpmyadmin seem ok! How can I debug this?
Go trough the perfect server guide for Ubuntu 18.04 and run each apt-get install command to ensure that all packages are installed. Afterwards run an ispconfig update and choose to reconfigure services during update to adjust the config files to the new ubuntu version. Finally, login to ispconfig and adjust the php paths under System > server config to match the new php version from Ubuntu 18.04.
THANX It got fixed when I hit the 8. Install Apache, PHP, phpMyAdmin, FCGI, SuExec, Pear, and mcrypt A bunch of php 7.2 stuff was installed !!
