When I navigate to any product in our WooCommerce shop, this error message appears in the error_log:
[04-Mar-2015 22:00:00 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 ')' at line 3 for query SELECT p.* FROM bcrc_wp_posts AS p
INNER JOIN bcrc_wp_term_relationships AS tr ON p.ID = tr.object_id INNER JOIN bcrc_wp_term_taxonomy tt ON tr.term_taxonomy_id = tt.term_taxonomy_id
WHERE p.post_date > '2015-02-06 10:59:30' AND p.menu_order = '52' AND p.post_type = 'product' AND p.post_status = 'publish' AND tt.taxonomy = 'category' AND tt.term_id IN () made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/neighborhood/woocommerce/single-product.php'), woocommerce_get_template_part, wc_get_template_part, load_template, require('/themes/neighborhood/woocommerce/content-single-product.php'), next_post_link, get_next_post_link, get_adjacent_post_link, get_adjacent_post, apply_filters('get_next_post_where'), call_user_func_array, cpto_get_next_post_where
Looking through the support forums here, I see another ticket for the same issue (theoretically caused by the Previous and Next Post in Same Taxonomy plugin) from a couple years ago, with a reply indicating that it would be fixed in the next release.
.