Facebook Share not updating when updating a post

Hi,
I have a problem with a website/ http://www.vitaminaksjonen.no
It will not update the Facebook Share after a post is updated. (See attachment)

When I update EasyBlog to the latest package than I get :
Warning
JInstaller: :Install: Can't find XML setup file.
Error
Unable to find install package
I also get this error when installing the complete package:
Fatal error: __clone method called on non-object in /home/vitamina/public_html/administrator/components/com_easyblog/includes/post/post.php on line 526

See attachment "Replication of “Del” (english Share) in Vitaminaksjonen.pdf"

I got this report from Siteground:
"I have investigated the cause for the issue and it appears to be due to a problem in the share functionality of the extension itself. The problem may originate from the EasyPost Workbench functions, but unfortunately I was not able to find a fully working solutions."

Solved
Thank you sooooo much for you help! Greatly appreciated!