Coursepress error when using no answer in Multiple choice

Hi there,

I'm getting an error when using Coursepress multi-choice questions. I have chosen no correct answer because it's just a choice question - no right answer, I just want to record what they think - and it's throwing up the following errors:

Warning: in_array() expects parameter 2 to be array, string given in /home/.../public_html/wp-content/plugins/coursepress/includes/unit-modules/checkbox_input.php on line 133