Broken database queries.

I got this from my host:

There are thousands of failed queries being sent.

 WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')) OR (mbr.to = wp_posts.ID AND mbr.from IN ())))
                        WHERE 1=1  AND ((wp_pos...' at line 2 for query
                        SELECT SQL_CALC_FOUND_ROWS  wp_posts.* , mbr.from AS mbr_from, mbr.to AS mbr_to, mbr.ID AS mbr_id, CASE WHEN mbr.to = wp_posts.ID THEN mbr.order_from WHEN mbr.from = wp_posts.ID THEN mbr.order_to END AS <code>mbr_order</code>
                        FROM wp_posts  INNER JOIN wp_mb_relationships AS mbr ON  (mbr.type = 'reviewed-by' AND ((mbr.from = wp_posts.ID AND mbr.to IN ()) OR (mbr.to = wp_posts.ID AND mbr.from IN ())))
                        WHERE 1=1  AND ((wp_posts.post_type = 'contributor' AND (wp_posts.post_status = 'publish')))
                        GROUP BY mbr_from, mbr_to, wp_posts.ID
                        ORDER BY <code>mbr_order</code> ASC, mbr_id DESC
                        LIMIT 0, 1
                 made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/kadence/404.php'), get_header, locate_template, load_template, require_once('/themes/kadence/header.php'), wp_head, do_action('wp_head'), WP_Hook->do_action, WP_Hook->apply_filters, iea_load_schema_data, iea_get_contributor_schema, iea_contributor_data, WP_Query->__construct, WP_Query->query, WP_Query->get_posts

When digging further, its coming from this script:

insiders-exclusive-authorship/vendor/meta-box/mb-relationships/inc/query/query.php

I have a plugin I wrote using relationships as well as some other modules. They're all included in the plugin, so I can get you a copy if you need it.

What can we do about this?