Update now error

Now I am getting the error Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘admin_header_style’ not found or invalid function name in /home/dudezone/domains/pixeldawgmedia.com/wp-includes/plugin.php on line 429

when I do anything with the logo. Any Ideas? I really love this template I just with I could get the menu on the mobile to work ??