Error: The RSS file isn’t working

We tried to get the RSS file for this podcast - https://podcasts.vrt.be/v1/program-46d854c4-7bc8-49c0-b7bd-d43c6d5ce122 - but it wouldn’t load for us.

array (
  'wrapperType' => 'track',
  'kind' => 'podcast',
  'collectionId' => 1346567686,
  'trackId' => 1346567686,
  'artistName' => 'Radio1',
  'collectionName' => 'Nieuwe Feiten Podcast',
  'trackName' => 'Nieuwe Feiten Podcast',
  'collectionCensoredName' => 'Nieuwe Feiten Podcast',
  'trackCensoredName' => 'Nieuwe Feiten Podcast',
  'collectionViewUrl' => 'https://podcasts.apple.com/us/podcast/nieuwe-feiten-podcast/id1346567686?uo=4',
  'feedUrl' => 'https://podcasts.vrt.be/v1/program-46d854c4-7bc8-49c0-b7bd-d43c6d5ce122',
  'trackViewUrl' => 'https://podcasts.apple.com/us/podcast/nieuwe-feiten-podcast/id1346567686?uo=4',
  'artworkUrl30' => 'https://is5-ssl.mzstatic.com/image/thumb/Podcasts113/v4/9e/f4/cd/9ef4cd80-aab0-b464-8d7f-fa092a47fe2b/mza_3213114093956831843.jpg/30x30bb.jpg',
  'artworkUrl60' => 'https://is5-ssl.mzstatic.com/image/thumb/Podcasts113/v4/9e/f4/cd/9ef4cd80-aab0-b464-8d7f-fa092a47fe2b/mza_3213114093956831843.jpg/60x60bb.jpg',
  'artworkUrl100' => 'https://is5-ssl.mzstatic.com/image/thumb/Podcasts113/v4/9e/f4/cd/9ef4cd80-aab0-b464-8d7f-fa092a47fe2b/mza_3213114093956831843.jpg/100x100bb.jpg',
  'collectionPrice' => 0.0,
  'trackPrice' => 0.0,
  'trackRentalPrice' => 0,
  'collectionHdPrice' => 0,
  'trackHdPrice' => 0,
  'trackHdRentalPrice' => 0,
  'releaseDate' => '2019-09-20T10:30:00Z',
  'collectionExplicitness' => 'cleaned',
  'trackExplicitness' => 'cleaned',
  'trackCount' => 300,
  'country' => 'USA',
  'currency' => 'USD',
  'primaryGenreName' => 'News',
  'contentAdvisoryRating' => 'Clean',
  'artworkUrl600' => 'https://is5-ssl.mzstatic.com/image/thumb/Podcasts113/v4/9e/f4/cd/9ef4cd80-aab0-b464-8d7f-fa092a47fe2b/mza_3213114093956831843.jpg/600x600bb.jpg',
  'genreIds' => 
  array (
    0 => '1489',
    1 => '26',
  ),
  'genres' => 
  array (
    0 => 'News',
    1 => 'Podcasts',
  ),
)...https://itunes.apple.com/lookup?id=1346567686

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