I've been trying to use Summary Cards with Large Image for months now and trying to get them to work is a nightmare. Having tried using several Wordpress plugins to do this, including a premium one, with no success, I eventually managed to get them to work using Yoast.
But I can no longer get the Yoast method to work for these cards. I tried to tweet two of my blog posts yesterday, and when I entered their URLs in the Card Validator, both of them looked great, and were accompanied with images. However when I then tried to share them to Twitter, I just got 2-lines of text with no image or post exerpt.
I wondered if there was a caching problem, and decided to try again today. Now when I put the URLs in the Card Validator I'm getting: "INFO: Page fetched successfully. WARN: No metatags found."
I do not have coding ability so I can't insert metatags using coding, especially as I'm using the Enfold theme, which overrides standard Wordpress coding.
I have added metatags to all the required Yoast fields, including correctly-sized images. I have also inserted info in the Wordpress Excerpt field. I have gone through all the Yoast instructions to make Twitter cards available again, step by step - in any case, it worked before so I don't think this is the problem.
I also have renditions from the JM Twittercards plugin visible on the Wordpress edit page, and it looks fine there, apart from picking up the wrong piece of text, probably due to Enfold's Advanced Layout Builder. However I did manage to get Twittercards to work before, using the same theme and layout builder.
When I try to share to Facebook I get none of these problems - I get a nice big featured image and an excerpt.
But I want to share these posts on my Twitter account. I don't have a Facebook page for my website.
Can anyone help?