i get an error with yafaray

everytime i render or click preview in yafaray blender stops working

My paranormal vision tells me that somewhere deep down there, there’s an error message in a black console window…

I cannot see the message though, as my image of it is a little muddy. Could you tell us what it says instead?

“Info: adding volume intergrator : None”
“error: don’t know how to create intergrator of type ‘none’!”
“creating new QApplicatioin”

And what version of Python, Blender and Yafaray do you have?