Dear, I check and change custom code to
add_filter('noo_related_jobs_query_args',function($query_args){
$job_tags = get_the_terms(get_the_ID(), 'job_tag');
if(!is_wp_error($job_tags) && !empty($job_tags)){
$query_args['tax_query'] = array('relation' => 'AND');
$job_tag_slugs = array();
foreach ($job_tags as $job_tag) {
$job_tag_slugs[] = $job_tag->slug;
}
$query_args['tax_query'][] = array(
'taxonomy' => 'job_tag',
'field' => 'slug',
'terms' => $job_tag_slugs,
);
}
return $query_args;
});
Now, i see it's working, please check your site again.
Best regards.