WordPress database error: [Unknown table 'wp_posts' in group statement]
SELECT ID, post_title FROM wp_posts p LEFT JOIN wp_term_relationships tr ON p.ID = tr.object_id LEFT JOIN wp_term_taxonomy tt ON tr.term_taxonomy_id = tt.term_taxonomy_id LEFT JOIN wp_ak_popularity pop ON p.ID = pop.post_id WHERE tt.term_id = '21' AND tt.taxonomy = 'category' AND post_status = 'publish' AND post_type = 'post' AND post_date < NOW() GROUP BY wp_posts.ID ORDER BY pop.total DESC LIMIT 10