Cobra Forum

Symptoms

• Unable to start NGINX:

#service nginx start
nginx: [emerg] unknown directive "passenger_enabled" in /etc/nginx/plesk.conf.d/vhosts/example.com.conf:43 nginx: configuration file /etc/nginx/nginx.conf test failed


• The Phusion Passenger component is not installed according to Plesk Installer going to Tools & Settings > Updates & Upgrades > Add/Remove Components > Web Hosting:

(https://pix.cobrasoft.org/images/2025/01/02/passenger.png)

• The Phusion Passenger is installed in the system:

#dpkg -s passenger
Package: passenger
Status: install ok installed
Cause
Plesk does not support Phusion Passenger installed manually.

Resolution

• Connect to the server via SSH.
• Remove custom Phusion Passenger server.
• Log in to Plesk.
• Go to Tools & Settings > Updates & Upgrades > Add/Remove Components > Web Hosting and install Phusion Passenger server.
• Start NGINX service:

#service nginx start