Replies: 0
In Util_PageUrls.php line 527, it tries to instantiate stdClass without making the reference global, as this file specifies a namespace.
$GLOBALS['post'] = new stdClass();
Results in fatal error when anyone posts a comment.
Should instead be:
$GLOBALS['post'] = new \stdClass();
This error only came up when I enabled purging the comment page when a comment is posted.