action error
Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'wp_cron' was given in /home/content/37/7992137/html/wp-includes/plugin.php on line 406

Fatal error: Call to undefined function wp_next_scheduled() in /home/content/37/7992137/html/wp-includes/update.php on line 421