Warning:  [mysql error 1064] You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '))
  AND (category_id NOT IN (101,339))
  ORDER BY date_available DESC, file ...' at line 5

SELECT DISTINCT(id)
  FROM piwigo_images i
    INNER JOIN piwigo_image_category AS ic ON id = ic.image_id
    LEFT JOIN piwigo_image_tag AS it ON id = it.image_id
  WHERE (category_id IN ())
  AND (category_id NOT IN (101,339))
  ORDER BY date_available DESC, file ASC, id ASC in /var/www/piwigo/include/dblayer/functions_mysqli.inc.php on line 847

Fatal error: Uncaught Error: Call to a member function fetch_assoc() on bool in /var/www/piwigo/include/dblayer/functions_mysqli.inc.php:908 Stack trace: #0 /var/www/piwigo/include/functions.inc.php(1640): query2array() #1 /var/www/piwigo/include/functions_search.inc.php(457): array_from_query() #2 /var/www/piwigo/include/functions_search.inc.php(1696): get_regular_search_results() #3 /var/www/piwigo/include/section_init.inc.php(364): get_search_results() #4 /var/www/piwigo/index.php(12): include('/var/www/piwigo...') #5 {main} thrown in /var/www/piwigo/include/dblayer/functions_mysqli.inc.php on line 908