Notice: Undefined index: search_form in drupal_retrieve_form() (line 809 of /var/www/html/includes/form.inc).
Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'search_form' not found or invalid function name in drupal_retrieve_form() (line 844 of /var/www/html/includes/form.inc).
Notice: Undefined index: module in i18n_node_form_search_form_alter() (line 400 of /var/www/html/sites/all/modules/i18n/i18n_node/i18n_node.module).