PHP pages on a Plesk server are offered to be downloaded or Apache test page is being shown when FastCGI is used.

Symptoms

• PHP pages are offered to be downloaded instead of being displayed properly in FastCGI handler mode.

• On clicking webmail icon in Plesk > Subscriptions > example.com > Mail > Email Addresses, the index.php or login.php file is downloaded.

• When accessing Roundcube or Horde webmail:
  - Browser downloads index.php or login.php files
  or
  - Apache test page is shown:

  

Cause

fcgid module for Apache is disabled or corrupted

Resolution

Enable fcgid module either via GUI:

1. Log in to Plesk

2. Enable
fcgid
module via Home > Tools & Settings > Apache Webserver > fcgid

Or via CLI:

1. Log in to Plesk over SSH

2. Enable it via CLI and restart Apache:

   # plesk bin optimization_settings --enable-module fcgid

Note: In case issue persists, reinstall fcgid module using Plesk autoinstaller : on the "Add and Remove Product Components" screen, the module can be found in Web Hosting > Apache section: