My company recently relaunched our website. In the process, we consolidated three websites in our family of sites into one. Each of the other sites had their own twitter account and URL schema.
Today, we discovered that URLs we try to share as Summary Cards are being rejected, and the error we get consistently is “WARN: Not Whitelisted”.
All of our Metadata appears correct; my best guess as one of the devs is that this Whitelist error has to do with the new website and that Twitter is choking on the new URL structures and DNS records and whatnot. Supposedly, Twitter doesn’t require validation for any non-media Card types, like a Summary Card. Still, we get the error almost every time, on every new article.
We need assistance. Thank you.