Unable to start nginx: Not starting nginx as it is disabled in config

Symptoms

• Plesk websites are not accessible.

• The following error can be found in the nginx error log file /var/log/nginx/error.log or on the Home page in Plesk:

  [emerg] 2060#0: duplicate listen options for [203.0.113.2]:80 in /etc/nginx/plesk.conf.d/server.conf:29

• It is not possible to start the Nginx webserver:

  # systemctl status nginx
  ...
  Process: 21034 ExecStartPre=/bin/sh -c [ '${NGINX_ENABLED}' = 'yes' ] || { echo Not starting nginx as it is disabled in Plesk. Run 'plesk sbin nginxmng -e' to enable nginx in Plesk.; exit 1; } (code=exited, status=1/FAILURE)

Cause

Nginx is disabled for starting in its own configuration.

In the corresponding configuration file, the NGINX_ENABLED line without any value is present:

• For RHEL-based operating systems: /etc/sysconfig/nginx.
• For Debian-like operating systems: /etc/default/nginx.

Resolution

1. Connect to the server via SSH.

2. Reconfigure nginx and Apache to listen on the correct ports by executing the two commands below:

   # plesk sbin nginxmng -d

   # plesk sbin nginxmng -e

Additional information

Nginx service enabled in Plesk is unable to start: Not starting nginx as it is disabled in Plesk.

Cannot start nginx service on Plesk server: Failed to start Startup script for nginx service

Apache with nginx | How Plesk with nginx Processes HTTP Requests | Plesk Obsidian documentation