Twitter’s Twitter Card Validator is giving me the 404 error when validating
http://mesodiscussion.com/view/20131271/
I have the same issue, here are my urls which returns a 404 in the validator (photo card):
http://www.ellecanada.com/style-club/never-fail-eyeliners-10-tried-and-true-classics/s/5260/
However, those urls work well (summary card):
