SQL error when no physical location

I recently found errors written to the php error log as far back as March of 2019 which I have traced to coming from displaying an event when “no physical location” has been selected, but locations are allowed. The event displays correctly with “Map Unavailable”. No location_id is filled in to the query, hence the error. I am running WP 5.3.2, php 7.3.13, and Events Manager 5.9.7.1. However, back when the error started, these were not the versions. Thank you for your help.
The error is: 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 1 for query SELECT location_name, location_address, location_town, location_state, location_postcode, location_region, location_country, location_latitude, location_longitude FROM xx_em_locations WHERE location_id = made by require(‘wp-blog-header.php’), require_once(‘wp-includes/template-loader.php’), include(‘/themes/weaver-xtreme/single.php’), weaverx_page_tail, weaverx_get_footer, get_footer, locate_template, load_template, require_once(‘/themes/weaver-xtreme/footer.php’), wp_footer, do_action(‘wp_footer’), WP_Hook->do_action, WP_Hook->apply_filters, {closure}