After doing update and upgrade I lost my "websites". 

I had to adjust for php7.2 and run the following commands. 

# apt-get install ajenti-v ajenti-v-nginx ajenti-v-mysql ajenti-v-php7.2-fpm php7.2-mysql ajenti-v-mail ajenti-v-ruby-puma ajenti-v-ftp-pureftpd ajenti-v-nodejs 

# sudo service ajenti restart