Sort by Highest Rated Not Working

First off thank you very much for this awesome plugin!

I am using another plugin called Geo my WordPress to display a list of all of my posts and I need the ability to sort the posts by Highest Rating. For some reason I cannot use the ?r_sortby=highest_rated param so I am hoping there is another way to sort by Highest Rated.

For example, the plugin accepts ?gmw_orderby= and ?gmw_orderby=highest_rated does not work.

I have tried to create a function along the lines of:

if( $orderby_value == ‘highest_rating’ ) {
$meta[‘key’] = ‘ratings_average’;
$clauses[‘orderby’] = $wpdb->postmeta. ‘meta_value’;

But this is not working either.

So is there a way to sort by highest_rated that doesn’t depend on adding the ?r_sortby=highest_rated URL parameter?

thx

https://www.ads-software.com/plugins/wp-postratings/