/includes/modules/pages/product_music/main_template_vars_product_type.php
Change
Code:

/*
 * extract info from queries for use as template-variables:
 */
  $products_artist_name = !empty($artist->fields['artists_name']) ? $artist->fields['artists_name'] : '';
  $products_artist_url = !empty($artist_info->fields['artists_url']) ? $artist_info->fields['artists_url'] : '';
  $products_record_company_name = !empty($record_company->fields['record_company_name']) ? $record_company->fields['record_company_name'] : '';
  $products_record_company_url = !empty($record_company_info->fields['record_company_url']) ? $record_company_info->fields['record_company_url'] : '';
  $products_music_genre_name = !empty($music_genre->fields['music_genre_name']) ? $music_genre->fields['music_genre_name'] : '';
  if (!empty($products_artist_url)) $products_artist_name = '<a href="' . zen_href_link(FILENAME_REDIRECT, 'action=music_artist&artists_id=' . zen_output_string_protected($music_extras->fields['artists_id']), 'NONSSL', true, false) . '" rel="noopener noreferrer" target="_blank">'.$products_artist_name.'</a>';
  if (!empty($products_record_company_url)) $products_record_company_name = '<a href="' . zen_href_link(FILENAME_REDIRECT, 'action=music_record_company&record_company_id=' . zen_output_string_protected($music_extras->fields['record_company_id']), 'NONSSL', true, false) . '" rel="noopener noreferrer" target="_blank">'.$products_record_company_name.'</a>';
to
Code:
/*
 * extract info from queries for use as template-variables:
 */
  $products_artist_name = !empty($artist->fields['artists_name']) ? $artist->fields['artists_name'] : '';
  $products_artist_url = !empty($artist_info->fields['artists_url']) ? $artist_info->fields['artists_url'] : '';
  $products_record_company_name = !empty($record_company->fields['record_company_name']) ? $record_company->fields['record_company_name'] : '';
  $products_record_company_url = !empty($record_company_info->fields['record_company_url']) ? $record_company_info->fields['record_company_url'] : '';
  $products_music_genre_name = !empty($music_genre->fields['music_genre_name']) ? $music_genre->fields['music_genre_name'] : '';
//  if (!empty($products_artist_url)) $products_artist_name = '<a href="' . zen_href_link(FILENAME_REDIRECT, 'action=music_artist&artists_id=' . zen_output_string_protected($music_extras->fields['artists_id']), 'NONSSL', true, false) . '" rel="noopener noreferrer" target="_blank">'.$products_artist_name.'</a>';
  if (!empty($products_artist_url)) {
    if (strpos($products_artist_url, HTTPS_SERVER) !== false) {
        $products_artist_name = '<a href="' . $products_artist_url . '">'.$products_artist_name.'</a>';
    } else {
        $products_artist_name = '<a href="' . zen_href_link(FILENAME_REDIRECT, 'action=music_artist&artists_id=' . zen_output_string_protected($music_extras->fields['artists_id']), 'NONSSL', true, false) . '" rel="noopener noreferrer" target="_blank">'.$products_artist_name.'</a>';
    }
  }
  if (!empty($products_record_company_url)) $products_record_company_name = '<a href="' . zen_href_link(FILENAME_REDIRECT, 'action=music_record_company&record_company_id=' . zen_output_string_protected($music_extras->fields['record_company_id']), 'NONSSL', true, false) . '" rel="noopener noreferrer" target="_blank">'.$products_record_company_name.'</a>';