Alternative Method for Using post_type_link Filter https://wp.me/p1lTu0-ghd

functions.php

add_filter( 'post_type_link', 'my_custom_permalink', 10, 3 );

function my_custom_permalink( $permalink, $post_id, $leavename ) {
    if (( strpos( $permalink, '%country-type%' ) === FALSE ) && ( strpos($permalink, '%region-type%' ) === FALSE )) 
    
    return $permalink;

    $post = get_post($post_id);
    if (!$post) return $permalink;

    $y_terms = wp_get_object_terms($post->ID, 'country-type');
    
    if (!is_wp_error($y_terms) && !empty($y_terms) && is_object($y_terms[0])) $y_taxonomy_slug = $y_terms[0]->slug;
    else $y_taxonomy_slug = 'country';

    $m_terms = wp_get_object_terms($post->ID, 'region-type');
    
    if (!is_wp_error($m_terms) && !empty($m_terms) && is_object($m_terms[0])) $m_taxonomy_slug = $m_terms[0]->slug;
    else $m_taxonomy_slug = 'region';

    return str_replace('%country-type%/%region-type%', $y_taxonomy_slug . '/' . $m_taxonomy_slug, $permalink);
}