After doing a little more searching around, including viewing the PHP errors, I found the following information:

Fatal error: Can't use function return value in write context in /var/www/html/inc/classes/BxDolTemplate.php on line 364

This is the line:

$bEmbedly = !empty(getParam('sys_embedly_api_key')) && !empty(getParam('sys_embedly_api_pattern'));