Sorry, yes it was deleted for testing reason…
Heres an other Link without an Image, even from the same Blogentry.
https://twitter.com/fotoglut/status/764101838228586496
The Source of that Blog has the folowing Entry:
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:site" content="@fotoglut" />
<meta name="twitter:creator" content="@drachenglut" />
<meta name="twitter:domain" content="fotoglut.de" />
<meta name="twitter:title" content="Wacken 2016 - Fotogalerie" />
<meta name="twitter:description" content="Fotos und Berichte vom Wacken Open Air 2016 ..." />
<meta name="twitter:image" content=".../040-Nachtimpression-Wacken-2016-fotoglut-160804-1400x935.jpg" />
The first was send via Plugin, the second, from the Twitterpage…
This the Result of Card Validator: