Twitter Card Validator Unable to Render Card

[netcraftsmen]

Out of the blue, our website started to show an “ERROR: Fetching the page failed because of other errors” message when testing the card validator on our urls. Every week we send out a tweet for our blog post using a redirect link from bitly, which has never had an issue in the past. I cannot figure out why images are not showing up on my tweets any more when including the url. Here are the urls I have been trying:

Redirect link (desired url): Troubleshooting ARP Issues with Routers and ASAs - NetCraftsmen

Blog url: Troubleshooting ARP Issues with Routers and ASAs - NetCraftsmen
URL affected (must be public):

I have tested both the bitly link and the actual link used on our website, but both appear to send this error message. I have checked our SSL certificate and it is up-to-date and has a grade A.

[Aurelia]

Hi @netcraftsmen Have you reviewed this article on steps to follow if you’re unable to render a card?

Card error, unable to render, or no image: READ THIS FIRST

Before posting a Cards issue, please READ the following: If you are posting about any issue with your site, please include a link to the publically-accessible URL where your Card markup is visible, or we will be unable to help you. If you are new to the forums, we don’t initially allow URLs to be posted (this is an anti-spam measure for new users), so please simply add some spaces, or surround the link with backticks (`) which will mark the link as code. You should make sure that you’ve checke…