Fatal Error Message

Hello Everyone,

Today I upgraded my wordpress to 3.6 and soon after I upgraded I am getting this error message: Fatal error: Call to a member function add_setting() on a non-object in /home/content/57/11059757/html/wp-content/themes/customizr/functions.php on line 265

I am not able to login to my admin panel or do anything. My host is godaddy.com and I have tried resetting the plugins through FTP that didnt work. I tried uninstalling and reinstalling wordpress on godaddy and that didnt work either. Any help would be greatly appreciated. The site that I am referring to is https://www.itsids.com