Site shows 404 not found on Plesk server: nginx error: index.html is not found (2: No such file or directory)

Symptoms

• Domain is inaccessible with 404 error.
  

  ---

  Rewrite rules specified in /var/www/vhosts/example.com/httpdocs/.htaccess file do not work.

• FPM application served by nginx handler is set in Domains > example.com > PHP Settings .
• In
/var/www/vhosts/example.com/logs/error_log
the following error is shown:

  [error] 20463#0: *1329372 "/var/www/vhosts/example.com/httpdocs/en/component/users/index.html" is not found (2: No such file or directory)

Cause

When FPM application served by nginx is enabled, the website stops using
.htaccess
file and rewrite rules from
.htaccess
are ignored.

Resolution

• Apply
/var/www/vhosts/example.com/httpdocs/.htaccess
rewriting rules to Additional nginx directives under Domains > example.com >  Apache and nginx settings.

  If these are CMS-based websites like WordPress or Joomla, apply the steps from the article After switching a WordPress website to FPM served by nginx in Plesk, it fails to load with "404 Not Found" on all pages except start page.

  Note: rewrite rules should be formed according to nginx syntax.

• Another solution is to change PHP support for domain from FPM application served by nginx to FPM application served by Apache under  Domains > example.com > PHP Settings.
  

• Alternatively, try to convert Apache rules to nginx using htaccess to nginx extension.

  To install the extension check the article How to manage Plesk extensions (install, disable, remove, update)

  Note: This extension is experimental. Always check the conversion results manually to prevent possible issues.