Add delete gives Issue on Easy Blog 5.0.26

Hello There,

We have recently upgraded to Easy Blog 5.0.26 installed for our site at
http://www.communities.cafh.org/test/index.php/blog

Under joomla admin when we add new post we are getting following error; -
“Malformed access token <token>”
Similarly
when we delete the post, although the post gets deleted successfully, I received the error: “400 - An error has occurred. Malformed access token <token>”

Can you please lets us know why this is occurring and can you fix this on urgent basis please
because same issue we are facing on live site while creating and deleting the post?

Thanks