Twitter can't read Photo Asset



I am trying to diagnose an issue with the Twitter Card previewer. My test URL is:

The resulting meta tags are as follows:

	<meta name="twitter:card" content="photo">
	<meta name="twitter:site" content="@cont3nt">
	<meta name="twitter:creator" content="Cont3nt">
	<meta name="twitter:url" content="">
	<meta name="twitter:title" content="Sword Fighting Practice">
	<meta name="twitter:description" content="This short iPhone video illustrates sword fighting training as practiced by medieval recreators.">
	<meta name="twitter:image" content="">

When I replace the twitter:image tag with an image from another server, it works just fine. I can view the image in my browser, and that also works fine. Without a better error message than: We seem to be having technical difficulty. I can’t diagnose the issue. Any help or direction would be greatly appreciated.

Best regards,

William Maness