[BUG] Unable to edit some files with File Manager in Plesk via HTTPS: file loads indefinitely

Symptoms

• Files like .htaccess or wp-config.php cannot be opened nor edited in Plesk File Manager via CodeEditor. They just keep loading:

  

• Going to Tools & Settings > Web Application Firewall (ModSecurity) > Web application firewall mode is set to On

• Nginx is uninstalled, disabled, or its service is not running:

  # plesk sbin nginxmng --status
  Disabled

  # plesk sbin nginxmng --status
  Error: Nginx component is not installed.

Cause

Resolution

Workaround

If update is not possible for some reason you may try the following