Hello! I have two URLs, one which does render a Twitter card and one which does not. I don’t believe there is anything different between the two; they both have the required twitter card markup in the (twitter:card, twitter:site, twitter:title) as well as twitter:description, twitter:image and twitter:creator
- working URL: https://www.skyscanner.net/news/14-worlds-most-amazing-abandoned-airports
- example Tweet: https://twitter.com/iainjames88/status/811588103995584513
- broken URL: https://www.skyscanner.net/news/world-s-10-cheapest-ski-resorts-revealed
- example Tweet: https://twitter.com/iainjames88/status/811588055169716224
The image size on both URLs is < 2 MB.
For the broken URL I do see the warning “WARN: Not whitelisted” when checking with the Twitter card validator but I understand this is misleading (Not Whitelisted, unable to render, or no image: READ THIS FIRST).
curl -A Twitterbot $URL I can see what I believe to be the correct markup in the section for both pages.