A Database Error Occurred

Error Number: 1139

Got error 'empty (sub)expression' from regexp

SELECT COUNT(w.id_watch) AS wtch, COUNT(cm.id_comment) AS cmnt, c.id_content AS id, c.title AS title, c.content_describ AS describ, m.id_menu AS idmenu, m.menu_name AS menu, c.kind AS kind, c.content_video AS video, c.content_thumbnail AS thumbnail, s.sub_name AS sub, u.name_user AS uname, c.content_status AS stat, c.content_datetime AS datearticle, s.id_sub AS idsub, u.id_user AS idUser, c.content_link AS link FROM content_tb c LEFT JOIN users_tb u ON u.id_user = c.id_user LEFT JOIN menu_sub_tb s ON s.id_sub = c.id_sub LEFT JOIN watch_content_tb w ON w.id_content = c.id_content LEFT JOIN comment_content_tb cm ON cm.id_content = c.id_content LEFT JOIN menus_tb m ON m.id_menu = c.id_category LEFT JOIN tags_tb t ON t.content_link = c.content_link WHERE t.the_tags REGEXP 'Musica NATAL |Musica|NATAL|' GROUP BY c.id_content,w.id_content LIMIT 10

Filename: models/Article_Model.php

Line Number: 407