such as this url; https://www.resistfromday1.org/authorsactivists-needed/
All the other urls show:
The card for your website will look a little something like this!
Unable to render Card preview
INFO: Page fetched successfully
INFO: 12 metatags were found
WARN: Not whitelisted
Even though the first url shows: *.resistfromday1.org is whitelisted for summary_large_image card
Meta tags are in page. Using wordpress 4.7.1
Also same thing on twitter.com The url that passes test works on twitter, the others that fail test dont work on twitter.
Any idea whats going on?
For that page, the twitter:title and twitter:description tags are identical, so that’s why the text appears twice.
The validator shows this error for other URLs on your site:
ERROR: Required meta tag missing (twitter:text:description)
This indicates that there is no text in the twitter:description tag. With Wordpress, the most common reason that I’ve seen for this is when a plugin is trying to populate the description field from the article excerpt, but there is no excerpt set, so the field is blank.
Thanks alot for your quick reply. i added the_excerpt(); to functions.php and its working now. 
system
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