WordPress database error: [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 meta.meta_value = 'feed' AND post.post_type IN ('page','post')' at line 3]
SELECT post.* FROM wpmg_posts AS post INNER JOIN wpmg_postmeta AS meta ON (post.ID = meta.post_id) WHERE meta.meta_key IN () AND meta.meta_value = 'feed' AND post.post_type IN ('page','post')