Warning:  [mysql error 2006] MySQL server has gone away

SELECT id,uppercats,commentable,visible,status,global_rank
  FROM piwigo_image_category
    INNER JOIN piwigo_categories ON category_id = id
  WHERE image_id = 15190

; in /var/www/codepoet.org/gallery2/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/codepoet.org/gallery2/include/dblayer/functions_mysqli.inc.php:913 Stack trace: #0 /var/www/codepoet.org/gallery2/include/functions.inc.php(1547): query2array() #1 /var/www/codepoet.org/gallery2/picture.php(459): array_from_query() #2 {main} thrown in /var/www/codepoet.org/gallery2/include/dblayer/functions_mysqli.inc.php on line 913


Warning:  [mysql error 2006] MySQL server has gone away

REPLACE INTO piwigo_sessions
  (id,data,expiration)
  VALUES('0389e74un528on3q1n68os72oogf25','pwg_device|s:7:\"desktop\";pwg_mobile_theme|b:0;pwg_show_metadata|i:1;pwg_referer_image_id|s:5:\"15190\";',now())
; in /var/www/codepoet.org/gallery2/include/dblayer/functions_mysqli.inc.php on line 847