Not working with Co-Author Plus plugin

Hi Sumit,

I am using Co-Author plus plugin to add multiple author to a post.
WP extended plugin works perfectly when i search main author of post, but when i search for co-author then no result found on search page.

Also tried below code.
add_filter(‘wpes_tax’, function($taxonomies){
$co_authors_tax = get_taxonomy(‘author’);
if (!empty($co_authors_tax)) {
$taxonomies[‘author’] = $co_authors_tax;
}

return $taxonomies;
});

but after adding this code and selecting author option in admin, site is getting stuck when searching anything and throw timeout error.

Please look into. Also please explain how can i search for with co-author display name.