Twitter cards all of a sudden not appearing



Our Twitter cards have been working for years and all of a sudden as of August 15 they’ve stopped. We haven’t done anything differently. After researching, I came across the “card validator” and every single link (even the ones which are working from last week) says this:
Unable to render Card preview
ERROR: Fetching the page failed because the fetcher cannot resolve the address.

Last tweet it worked:
First tweet it stopped:

Please help!


Looks like this is working now - apologies but we had some temporary DNS resolution issues over the last few days.


Yes, it fixed itself yesterday. Thanks for your reply.