Warning:  [mysql error 1064] You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 16

SELECT
    c.*,
    user_representative_picture_id,
    nb_images,
    date_last,
    max_date_last,
    count_images,
    nb_categories,
    count_categories
  FROM piwigo_categories c
    INNER JOIN piwigo_user_cache_categories ucc
    ON id = cat_id
    AND user_id = 2
  WHERE id_uppercat is NULL
      
  ORDER BY rank in /home/boulderw/boulderwall.com/photos/include/dblayer/functions_mysqli.inc.php on line 845