I am getting log error on my server

Fatal error: Class 'log' not found in /home/content/55/11427855/html/collegekida/includes/classes/oc.php on line 80

Fatal error: Class 'log' not found in /home/content/55/11427855/html/collegekida/includes/classes/oc.php on line 38

link : http://collegekida.com/

i'm getting this error on my live server ??