Hello, if you noticed that your instant articles stopped showing on your facebook page, try to run your rss link that you provided usually this should be

http://www.mysite.com/index.php?option=com_easyblog&view=latest&format=feed&type=rss&instant=true

there you will probably get this error

call to a member function get() on null

in that case go to your facebook page Settings/Instant Articles and on the Tools tab at the bottom change the rss you provided by removing the &instant=true part it should be like this

http://www.mysite.com/index.php?option=com_easyblog&view=latest&format=feed&type=rss

and VOILA!