Configure Rails environment (development, staging, production) on virtual host basis in Litespeed
Go to Configuration > Virtual Hosts > Context > Rails Enviornment
ISPConfig error.log: an unknown filter was not added: PHP
This is caused by the version of apache not being what ISPConfig expects it to be. The ISPConfig virtual hosts file, located /etc/httpd/conf/vhosts/Vhosts_ispconfig.conf, has some configuration file lines that need to be removed. The lines are not a bug but are for different versions of apache.