Internal server error on twitter card validator


#1

My website posts to twitter but I want to post the large image with summary tweet, not just the link. When I go through my Yoast SEO plugin and try the twitter card validator I get internal server error.
Here is a sample post:
http://www.astroainslie.com/moon-sextile-pluto-thoughts-are-things/

I checked with my server and got this response:
Hello,

I’ve cross-verified the issue and was able to replicate the same. However, the back-end permission and configuration is fine for the website. There was a recent report on the the same issue at Twitter cards not working. Validator returns ‘Internal Server Error’ . However, there isn’t any solutions provided for that. You can refer: http://torquemag.io/installing-twitter-cards-wordpress-site/ which says that issue is with Twitter’s Validator itself. Please contact the twitter support regarding this and seek their assistance.


#2

Can I get some help with this issue? Does Twitter not have any staff?