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 MySQL server version for the right syntax to use near ') ) AND ( `t`.`post_type` = "artists" ) AND ( `polylang_languages`.`object_id` I' at line 11