I've just recently upgraded a number of our sites running YARPP to WP4.3.2 and now am randomly getting the following error:
WordPress database error: [Table 'expertm1_wrd13.wp_yarpp_related_cache' doesn't exist]
SELECT SQL_CALC_FOUND_ROWS wp_posts.*, yarpp.score FROM wp_posts join wp_yarpp_related_cache as yarpp on wp_posts.ID = yarpp.ID WHERE 1=1 AND wp_posts.post_type IN ('post') AND (wp_posts.post_status = 'publish') ORDER BY yarpp.score DESC limit 5
In this case, it appears to be happening when using iinclude() plugin to pull in the Page (not Post) content into the site's theme.
Turning off the YARPP plug-in will immediately resolve the problem.