Error message

• User warning: The following module is missing from the file system: page_title. For information about how to fix this, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1156 of /home/customer/www/klubcrnizmaj.com/public_html/includes/bootstrap.inc).
• Warning: count(): Parameter must be an array or an object that implements Countable in _uc_line_item_list() (line 133 of /home/customer/www/klubcrnizmaj.com/public_html/sites/all/modules/ubercart/uc_order/uc_order.line_item.inc).