Mysql Error: in /var/www/html/rd_core/modules/site.model.php on line 369: Got error 'empty (sub)expression' from regexp [Query: SELECT * FROM `texts_skrastas` WHERE `name` REGEXP '^.*(|2013-05-21|2013-05-20|2013-05-19|2013-05-18|2013-05-17|2013-05-16|2013-05-15).*$' AND `date_from`<='2013-05-22' AND `date_to`>='2013-05-22' AND `state`<>'hidden' AND `idp`<>1130415990 AND `module_id`<>610 ORDER BY `name` DESC]