Unable to render Card preview (Player Card)

player
cards

#1

I’m getting an error saying

Unable to render Card preview

when submitting a link with a player card to the twitter card validator. The validator also says

*.netresec.com whitelist request for player card is pending approval

Does the domain need to be whitelisted before a player card can be previewed/validated?

The link I’ve submitted is this one:
https://www.netresec.com/?page=Blog&month=2018-02&post=Zyklon-Malware-Network-Forensics-Video-Tutorial

Also, the “Log” box says:


INFO:  Page fetched successfully
INFO:  29 metatags were found
INFO:  twitter:card = player tag found
WARN:  Not whitelisted

UPDATE
Our domain name has now been approved for Player Cards. We’re now able to verify the cards using the twitter card validator and video playback works just fine on twitter. Here’s an example:


#2