I am trying to implement message card in my website http://owlwiseioslocal.anasource.com and I have requested my domain from https://cards-dev.twitter.com/validator for the approval process. But i got the mail from twitter like as below
“The URL you provided for owlwiseioslocal.anasource.com to use the message card is inaccessible. Please check to make sure the page is available, then reapply for a Twitter card.”.
I have successfully validated the player card, summary and summary_large_image card for the same domain. Can you please help me why this is not working for the “message” card.