backend: assign admin rights to team blog user --> page load error

Hello,

I just discovered a small issue with my EasyBlog admin component.

Under Team Blogs > (Team Name) > Members,

I want to 'Give Admin Rights' to a user so I click on that link, but it leads to an error page. The message is: Invalid Token and the URL is:

http://www.eslrok.com/administrator/index.php?option=com_easyblog&lang=&c=teamblogs&task=markAdmin&teamid=1&userid=791&undefined=1

Is there any way to fix this problem?

Thank you very much for your continued support,
Best,
Ben