Tornado Warning in Fort Lauderdale

Fatal error: Uncaught Error: Call to a member function getUser() on null in /usr/local/www/classes/comments-class.php:267 Stack trace: #0 /usr/local/www/classes/comments-class.php(75): threadedComments->formatComment(Object(stdClass)) #1 /usr/local/www/classes/comments-class.php(100): threadedComments->printParent(Array) #2 /usr/local/www/insideftl/comments.php(74): threadedComments->printComments(Array) #3 /usr/local/www/insideftl/single-post.php(208): require_once('/usr/local/www/...') #4 /usr/local/www/insideftl/post.php(22): include('/usr/local/www/...') #5 /usr/local/www/insideftl/index.php(170): include('/usr/local/www/...') #6 {main} thrown in /usr/local/www/classes/comments-class.php on line 267