Sharing problem.Metadata og tags not recognized by facebook: Please help!

Hello musers! I´m having a very delicate problem. I shared one of my pages on facebook using this metadata:

<meta property="og:url"                content="https://www.wallstreet-peru.com/blog/en-cuanto-tiempo-se-aprende-ingles.html" />

<meta property="og:title"              content="¿En cuanto tiempo se aprende inglés?" />

<meta property="og:description"        content="Cuando nos decidimos aprender un nuevo idioma, es normal que una de las cosas que más nos preguntemos, es si el proceso de aprendizaje será rápido y con el inglés, esto no es diferente. No es un secreto que a todos nos gustaría abrir un libro y en un abrir y cerrar de ojos hablar el idioma de manera fluida." />

<meta property="og:image"              content="https://www.wallstreet-peru.com/blog/imageuploads/en-cuanto-tiempo-se-aprende-ingles.jpg" />

Everything was fine until few days ago when the picture disappeared. The page link is : https://www.wallstreet-peru.com/blog/en-cuanto-tiempo-se-aprende-ingles.html

I tried to use the facebook sharing debugger, I scraped 10 times but nothing happened.

I tried to share another page on facebook using the qooqee facebook share widget. These are the metadata og tags :

<meta property="og:title" content="Aprende inglés con una de tus leyendas favoritas : Game of Thrones" />

<meta property="og:site_name" content="Wall Street English Blog"/>

<meta property="og:description" content="“A Song of Ice and Fire” (una canción de hielo y fuego) es una serie de libros de temática fantástica escritos por el escritor americano George R.R. Martin que ya se ha transformado en un mito y que se lo compara entre los grande de la narrativa fantástica como Tolkien. Martin empezó a escribir los libros en 1991, y su primer volúmen fue recién publicado en 1996: A Game of Thrones." />

<meta property="og:url" content="https://www.wallstreet-peru.com/blog/aprende-ingles-con-una-de-tus-leyendas-favoritas-game-of-thrones.html" />

<meta property="og:image" content="https://www.wallstreet-peru.com/blog/imageuploads/daenaeris-snow.jpg" />

The link of the page : https://www.wallstreet-peru.com/blog/aprende-ingles-con-una-de-tus-leyendas-favoritas-game-of-thrones.html

Facebook does not recognize my meta tags. I used the sharing debugger, I scraped million times, but no success.

What am I doing wrong? Can you please use the sharing debugger on both links and see what´s this all about?

It´s not the first time to do this. I did hundreds of time and everything worked fine.

     I´m working on a blog and I I´ve already shared some topics on facebook and now they are not rendering correctly. The pictures dissappeared in most of the posts and the last article(the one with game of thrones) doesn´t work at all. I get a lot of errors from the sharing debugger but everything is fine.

    Please help! It is very important as we already shared some topics and people will see them without pics. And we cannot share our new ones.

    Thank you very much