I’m trying to implement a Player Card. I’ve created a temporary/test page NSFW and a temp/test page NSFW. I’ve followed the instructions on player documentation and tested the player iframe on android/iOS/web. When I try to preview the card in the validator, I see it finds all the meta tags and recognizes the player card but I get the domain is not whitelisted message and the preview doesn’t render.
From the documentation:
Test your experience across all Twitter clients, including Twitter’s iPhone and Android apps, as well as twitter.com and mobile.twitter.com. Cards that do not work in all Twitter clients listed will not be approved.
So my question is how am I supposed to test my experience before requesting approval if I cannot test my experience without requesting approval and getting whitelisted?