ERRO MESSAGE IN POSTS: Warning: Creating default object from empty value in

Hi I am getting some error messages in some blog posts of our site:

"Warning: Creating default object from empty value in /home/xxxxx/public_html/administrator/components/com_easyblog/includes/videos/videos.php on line 222"

It appear in the preview of many blog posts, here in this link you check it, and this appear also in other sections. How to fix it?

http://tutorialmaster.com.br/cursos/curso-de-illustrator.html?start=10

Thanks
Bruno