Database Error; SQL: SELECT
DISTINCT
`t`.*
FROM `wp_posts` AS `t`
LEFT JOIN `wp_term_relationships` AS `polylang_languages`
ON `polylang_languages`.`object_id` = `t`.`ID`
AND `polylang_languages`.`term_taxonomy_id` = 8
WHERE ( ( LEFT(post_title, 1) IN () ) AND ( `t`.`post_type` = "artists" ) AND ( `polylang_languages`.`object_id` IS NOT NULL ) AND ( `t`.`post_status` IN ( "publish" ) ) )
ORDER BY `t`.`menu_order`, `t`.`post_title`, `t`.`post_date`
LIMIT 0, 15; Response: 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 ( `t`.`post_type` = "artists" ) AND ( `polylang_languages`.`object_id...' at line 11