Web configuration error in Plesk interface: Undefined array key "sfport"

Symptoms

• Web configuration error in Plesk interface:

  PLESK_ERROR: New configuration files for the Apache web server were not created due to the errors in configuration templates: nginx: [emerg] invalid port in upstream "127.0.0.1:" in /etc/nginx/plesk.conf.d/vhosts/example.com.conf:107 nginx: configuration file /etc/nginx/nginx.conf test failed . Detailed error descriptions were sent to you by email. Please resolve the issues and click here to generate broken configuration files once again or here to generate all configuration files.

• Errors while running web repair command for domain:
  

  # plesk repair web example.com -v -y
  - httpdmng failed: PHP Warning: Undefined array key "sfport";
  File: /opt/psa/admin/plib/modules/seafile/library/Domain.php,
  Line: 84
  PHP Warning: Undefined array key "sfport" in
  /opt/psa/admin/plib/modules/seafile/library/Domain.php on line
  84
  PHP Warning: Undefined array key "shport"; File:
  /opt/psa/admin/plib/modules/seafile/library/Domain.php, Line:
  90
  PHP Warning: Undefined array key "shport" in
  /opt/psa/admin/plib/modules/seafile/library/Domain.php on line
  90

Cause

Web misconfiguration caused by the Seafile extension.

Resolution

1. Log in to Plesk

2. Navigate to Extensions > Seafile and disable the extension

3. Run the web repair command:

   # plesk repair web example.com -y

4. Enable the extension back
5. Ensure that there are no web configuration errors:

   # plesk repair web -n