Thread:Project:Support desk/SpecialPages gives 500 Internal Service Error - Premature end of script headers: php5

MediaWiki 1.22.2

PHP 5.3.6 (cgi-fcgi)

MySQL 5.1.72-cll

URL: http://resources.spertus.edu/sentinel

Whenever I try to access SpecialPages (http://resources.spertus.edu/sentinel/index.php?title=Special:SpecialPages), I get a 500 Internal Service Error. Here is the full error message on the page:

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, webmaster@resources.spertus.edu and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

The error generated in the Apache error log:

Additional details:

This seems to only happen when I access SpecialPages. All other pages work fine, to my knowledge. I have PHP configured to do full error reporting. Any help would be greatly appreciated. This is a fresh install; all I did was unzip the MediaWiki.gzip file and went through the installation process to create my LocalSettings.php file. Any help would be appreciated.