Unable to start NGINX: [emerg] unknown directive "passenger_enabled"

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:

  

• 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

1. Connect to the server via SSH.

2. Remove custom Phusion Passenger server.

3. Log in to Plesk.

4. Go to Tools & Settings > Updates & Upgrades > Add/Remove Components > Web Hosting and install Phusion Passenger server.

5. Start NGINX service:

   # service nginx start