What to do if the Open Graph protocol does not work?

Question

open graph

Good day, friends!
Please help. There is a site nutday.ru and you need to connect the Open Graph protocol to it. The fact is that having done everything as it is written on the Internet, "Contact" does not want to accept links on the wall in the markup specified in the page code.
So the question is, what did I do wrong? Who can tell me what needs to be done so that "Contact" starts loading link thumbnails?
Thank you very much in advance for your reply!

Answer 1

Everything works great.
Sometimes Open Graph is cached, you can clear the cache for VK here: https://vk.com/dev/pages.clearCache
Facebook has a debugging page: https://developers.facebook.com/tools/debug/

Answer 2

Very strange. Checked on someone else's computer - everything is fine. On my own home, it doesn’t support anything! Although I cleaned both the "contact" cache and the browser cache. Okay, I'll figure it out! Thanks for the answer!