Bug in version of the Post Indexer Plugin

The new version of the Post Indexer plugin is throwing this error:

[15-Nov-2016 23:35:00 UTC] 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 ”YEAR’:wink: < CURRENT_DATE() LIMIT 50′ at line 1 for query SELECT BLOG_ID, ID FROM blogs_network_posts WHERE DATE_ADD(post_date, INTERVAL 20 ‘YEAR’:wink: < CURRENT_DATE() LIMIT 50 made by do_action_ref_array, call_user_func_array, postindexercron->process_tidy_agedposts, postindexermodel->remove_posts_older_than