I actually do have the same problem / question…
Bad value twitter:card for attribute name on element meta: Keyword twitter:card is not registered.
Bad value twitter:site for attribute name on element meta: Keyword twitter:site is not registered.
Bad value twitter:creator for attribute name on element meta: Keyword twitter:creator is not registered.
Bad value twitter:description for attribute name on element meta: Keyword twitter:description is not registered.
12 Errors resulting on using the meta card twitter option… 🙁
It’s true. Facebook uses the same.
To solve the issue:
- navigate to the following directory within your wordpress installation:
/wp-content/plugins/wordpress-seo/frontend
- In that directory, open the file called “class-twitter.php”
- search for the text “meta name” (without quotes) and change all occurrences to “meta property”
Issue solved.
But I hope Yoast makes the change also or we will loose the change after plugin update.
