Horde Webmail produces 500 internal server error

Refers to:

  • Plesk 11.5 for Linux
  • Plesk 12.0 for Windows
  • Plesk 12.0 for Linux

Created:

2016-11-16 12:57:39 UTC

Modified:

2016-12-21 19:38:14 UTC

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Horde Webmail produces 500 internal server error

Symptoms

Horde Webmail produces 500 internal server error in the Apache webserver log file /var/log/httpd/error_log

[warn] [client 91.204.25.4] mod_fcgid: stderr: PHP Fatal error:  require_once() [<a href='function.require'>function.require</a>]: Failed opening required '__DIR__/lib/Application.php' (include_path='.:') in /usr/share/psa-horde/index.php on line 16
[warn] [client 91.204.25.4] mod_fcgid: stderr: PHP Notice: Use of undefined constant __DIR__ - assumed '__DIR__' in /usr/share/psa-horde/index.php on line 16

Cause

Horde 5.x is required PHP 5.3.0 or above.
PHP version installed on the server is incompatible.

Resolution

Consider updating the PHP version installed on the server to the required.

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