Apache default page is shown in the browser instead of website hosted in a Plesk server: Error IP address not found on interface

Symptoms

• Website example.com is not accessible. A blank page or default Apache page is shown in the browser;

• Apache and nginx services are up and running;

• The plesk repair web utility returns the following output:

  # plesk repair web example.com

  IP address not found on interface(s): 203.0.113.2 .............. [ERROR]
  IP address not found on interface(s):
  2001:db8:f61:a1ff:0:0:0:80 ............................ [ERROR]
  Broken binding for domain: example.com ...................... [ERROR]
  Repairing web server configuration for the domain
  example.com ............................................... [OK]

  Some of registered IPs (203.0.113.2,
  2001:db8:f61:a1ff:0:0:0:80) were not found on network
  interfaces thus preventing bound domains (example.com) from
  operate properly. Remap these domains to operational IPs and rebuild
  server configuration files ........................................ [WARNING]
  Error messages: 3; Warnings: 1; Errors resolved: 0

Cause

IP address misconfiguration.

Resolution

Repair IP addresses on the server:

1. Log into Plesk.

2. Navigate to Plesk > Tools & Settings > IP addresses and press button Reread , and then the Repair button if necessary.

3. Rebuild website configuration in Tools & Settings > Diagnose and Repair > Web & FTP Servers > Repair