The card validator server errors


The card validator says server error 9/10 times and I got an email that my url is inaccessible.

"We can make it work. Let us explain.

The URL you provided to use the product card is inaccessible. Please check to make sure the page is available, then reapply for a
Twitter card.

Reapply for a card at:"

But it’s not a website error, I have a fast website with no downtime. Its a validator error.