This issue occurs usually because of bad install of the script.
Can you clarify if you have cloned the ArduBerry repository to Desktop. Are you running the install.sh script from
If you haven't then remove the existing ArduBerry folder and clone it again to Desktop and run the install script following the instructions given here.
It looks like you are using an image other than our Raspbian for Robots. Can you tell us which image you are using and is there any specific reason for using it.