Hi

I hope someone can help me with this.
I made a website for a customer in C5.
Yesterday I noticed the dashboard URL is giving following error.

Fatal error: Call to a member function getUserID() on a non-object in /public/sites/www.tripled-design.info/concrete/models/user_statistics.php on line 39

Can Anyone help me out here, I really need to get this fixed, but dont know where I went wrong in the first place.

Thanks in Advance.