Gooday,
We guess there is a conflict between YOAST and Twitter cards generation. When we have the Yoast plugin activated if we do:
curl -f – Twitterbot https://blog.euskaltel.com/entrevista-a-las-hermanas-mas-cool-de-donostia-sisters-and-the-city/
it returns the following error:
curl: (22) The requested URL returned error: 500 Internal Server Error
and if we deactivate the plugin we return the html well:
<! DOCTYPE HTML>
<html>
<head>
<meta http-equiv = “Content-Type” content = “text / html; charset = utf-8”>
<meta name = “viewport” content = “width = device-width, initial-scale = 1, maximum-scale = 1”>
<title> Interview with the coolest sisters in Donostia: Sisters and the City | Euskaltel Blog </ title>
Thanks for your help.
Best regards.