This script was working in Expression Engine V2 but isn't at version 5. Can someone tell me how to get the thumnail URL of this rss feed?

Other info is already working..

{exp:rss_parser url="https://nieuws.optima.nl/rss" limit="1" refresh="720"} {media:thumbnail@url} (<-- this is not working) {/exp:rss_parser}

This script was working in Expression Engine V2 but isn't at version 5. Can someone tell me how to get the thumnail URL of this rss feed?

Other info is already working..

{exp:rss_parser url="https://nieuws.optima.nl/rss" limit="1" refresh="720"}
{media:thumbnail@url} (<-- this is not working)
{/exp:rss_parser}