Hi Im having this problem when I test my page with twitter card validator.
Unable to render Card preview Log
INFO: Page fetched successfully
INFO: 13 metatags were foundWARN: Not whitelistedMy page is https://sailchecker.com/blog/torregrossa-fineart-giveaway/ can you whitelist my site please thanks
Can you also whitelist: http:abitareuk.com please!
There is no need for Whitelisting unless you have a player card.
Please see this topic and follow all of the troubleshooting steps. Let us know if things do not work after that.