Creating a twitter audio card - Unable to render Card preview


#1

I am working on creating an audio player card but it fails to render in the card validator. I have all links https://
Do you need to be white listed before you can see the rendered card?

https://99centbeats.com/tweet/page.html:

<!DOCTYPE html>
<head>
    <meta content="text/html; charset=UTF-8" name="Content-Type" />
	<meta name="twitter:card" content="player">
	<meta name="twitter:site" content="@99centbeats_com">
	<meta name="twitter:title" content="Instrumental Sampler">
	<meta name="twitter:description" content="This is a sample instrumental.">
	<meta name="twitter:image" content="https://99centbeats.com/tweet/twittercard.png">
	<meta name="twitter:player" content="https://99centbeats.com/tweet/container.html">
	<meta name="twitter:player:width" content="480">
	<meta name="twitter:player:height" content="480">
    <meta name="twitter:player:stream" content="https://99centbeats.com/1e4cb5f584d055a0992385c1b2155786/28dafd4a8cb5f33065e93cbc83862563/molly-longer-version-54a810f55d.mp3">
	<meta name="twitter:player:stream:content_type" content="audio/mpeg">
</head>

https://99centbeats.com/tweet/container.html:

<!DOCTYPE html>
<html>

<body>
<audio controls>
  <source src="https://99centbeats.com/1e4cb5f584d055a0992385c1b2155786/28dafd4a8cb5f33065e93cbc83862563/molly-longer-version-54a810f55d.mp3" type="audio/mpeg"></source>
Your browser does not support the audio element.
</audio>
</body>
</html>