I am getting an error message when trying to use the Batch Manager under Photos:

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 3

SELECT DISTINCT(image_id)
   FROM piwigo_image_category
   WHERE category_id IN ()
; in /var/www/html/piwigo/include/dblayer/functions_mysqli.inc.php on line 834


Fatal error: Call to a member function fetch_assoc() on a non-object in /var/www/html/piwigo/include/dblayer/functions_mysqli.inc.php on line 181