I even tried disabling all plugins just to be sure.
here is the error:
when searching for let’s see
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 ‘s see%’ GROUP BY ID ORDER BY post_date DESC LIMIT 0, 10′ at line 1]
SELECT SQL_CALC_FOUND_ROWS wp_posts.* FROM wp_posts LEFT JOIN wp_post2tag p2t on wp_posts.ID = p2t.post_id INNER JOIN wp_tags on p2t.tag_id = wp_tags.tag_id WHERE 1=1 AND (((post_title LIKE ‘%let\’s%’) OR (post_content LIKE ‘%let\’s%’)) AND ((post_title LIKE ‘%see%’) OR (post_content LIKE ‘%see%’)) OR (post_title LIKE ‘%let\’s see%’) OR (post_content LIKE ‘%let\’s see%’)) AND (post_type = ‘post’ AND (post_status = ‘publish’ OR post_status = ‘private’)) OR wp_tags.tag like ‘%let’s see%’ GROUP BY ID ORDER BY post_date DESC LIMIT 0, 10