Warning:  [mysql error 1017] Can't find file: './NY15@002dpiwigo/piwigo_user_cache.MYI' (errno: 2 "No such file or directory")

SELECT
    ui.*,
    uc.*,
    t.name AS theme_name
  FROM piwigo_user_infos AS ui
    LEFT JOIN piwigo_user_cache AS uc ON ui.user_id = uc.user_id
    LEFT JOIN piwigo_themes AS t ON t.id = ui.theme
  WHERE ui.user_id = 2
; in /var/www/clients/client0/web2/web/phpAlbum/include/dblayer/functions_mysqli.inc.php on line 847

Fatal error: Uncaught Error: Call to a member function fetch_assoc() on boolean in /var/www/clients/client0/web2/web/phpAlbum/include/dblayer/functions_mysqli.inc.php:211 Stack trace: #0 /var/www/clients/client0/web2/web/phpAlbum/include/functions_user.inc.php(379): pwg_db_fetch_assoc(false) #1 /var/www/clients/client0/web2/web/phpAlbum/include/functions_user.inc.php(293): getuserdata(2, true) #2 /var/www/clients/client0/web2/web/phpAlbum/include/user.inc.php(76): build_user(2, true) #3 /var/www/clients/client0/web2/web/phpAlbum/include/common.inc.php(156): include('/var/www/client...') #4 /var/www/clients/client0/web2/web/phpAlbum/index.php(11): include_once('/var/www/client...') #5 {main} thrown in /var/www/clients/client0/web2/web/phpAlbum/include/dblayer/functions_mysqli.inc.php on line 211