No preview post on Facebook

Your site do not contain meta tags(og tags) and the link do not load any preview content at facebook url scraper.

Also it returns Curl Timeout errors(please contact your hosting provider to fix this).

For more info please check : https://developers.facebook.com/tools/debug/?q=https%3A%2F%2Fwww.gazzettatoscana.it%2Fweb%2Ffiorentina-e-la-nostra-storia-a-marzo-quattro-incontri-col-museo-fiorentina-dal-7-marzo-allassociazione-rondinella-del-torrino%2F

Really really thanks for your answer!
I Understand, but trying and searching online I don’t know how can add the missing meta tags… I tryed to force from plugin settings allowing Open Graph but without result, I tryed also to add manually the code of meta tags into the header of theme but unfortunally don’t change nothing.

Could you suggest how can add the missing tags?
Thanks!!!

Curl Timeout : The request to scrape the URL timed out.

This error returning from debugger means server spent a lot of time to respond to the requests, and then Facebook Debugger threw a Timeout.

You should use some caching plugin also any seo plugin for inserting social media meta tags.After this please retry your post url at https://developers.facebook.com/tools/debug/

Hope this helps.

Really really thanks! I resolved my problem updating my app in Facebook developer center. I also installed Yoast SEO but seems it’s indifferent with or without it.
Best greetings!