Twitter not showing image when tweeting link

I have successfully used Yoast SEO plugin for two different websites for more than a year, and have never had a problem getting my social media images to display properly — until now. When I attempt to tweet this page of my website (https://ourgreatnation.com/2022/09/27/american-renewal-movement-philosophy-and-goals/), it does not display my Twitter card or any image at all. In the Yoast plugin I specified a 445 KB .png file as the Twitter image for that page. I specified the same image for Facebook and it does display on Facebook.

Here are some of the relevant meta tags that appear in the code when viewing page source:

<meta property=”og:image” content=”https://ourgreatnation.com/wp-content/uploads/2022/09/American-Renewal-Movement-social-image.png&#8221; />
<meta property=”og:image:width” content=”600″ />
<meta property=”og:image:height” content=”350″ />
<meta property=”og:image:type” content=”image/png” />
<meta name=”twitter:card” content=”summary_large_image” />
<meta name=”twitter:image” content=”https://ourgreatnation.com/wp-content/uploads/2022/09/American-Renewal-Movement-social-image.png&#8221; />

Here is what the Twitter card validator (https://cards-dev.twitter.com/validator) returns when checking the page:

INFO: Page fetched successfully
INFO: 26 metatags were found
INFO: twitter:card = summary_large_image tag found
INFO: Card loaded successfully

It also says “Unable to render Card preview” but I read that Twitter has disabled card previews on the validator page.

I have tried to get my Twitter card image for this page to display in a tweet, using two different Twitter accounts. However, Twitter won’t display any image for this page, neither the image I specified for the card nor any of the images on the page.

Do you have any ideas of what could be going wrong and suggestions for troubleshooting? Thank you for any help that anyone can provide!

The page I need help with: [log in to see the link]