Get cover photo of actually logged user

Hi there,

I'll get actually logged user cover photo in other module (Easyblog welcome).

I tried to use every suggestion in ES Documentation:

http://stackideas.com/docs/easysocial/developers/users/users

but with no results - it turns me an error:

Fatal error: Call to a member function getSource() on a non-object in /modules/mod_easyblogwelcome/tmpl/default.php on line 48

How can I solve this issue?

Best regards!
Adam