[Download-Code] Problem With the Plugin

I installed the plugin and when I put The Download code do show the link the pagg with the link shows the following message at the botton:

WordPress database error: [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 ‘) GROUP BY wp_posts.ID ORDER BY wp_posts.post_date DESC LIMIT 4’ at line 8]
SELECT DISTINCT ID, post_title FROM wp_posts LEFT JOIN wp_term_relationships ON(wp_posts.ID = wp_term_relationships.object_id) LEFT JOIN wp_term_taxonomy ON(wp_term_relationships.term_taxonomy_id = wp_term_taxonomy.term_taxonomy_id) LEFT JOIN wp_terms ON(wp_term_taxonomy.term_id = wp_terms.term_id) WHERE wp_posts.post_type = ‘post’ AND wp_posts.post_status = ‘publish’ AND wp_posts.ID <> 402 AND wp_term_taxonomy.taxonomy = ‘post_tag’ AND () GROUP BY wp_posts.ID ORDER BY wp_posts.post_date DESC LIMIT 4