[Zero Tolerance]

It would appear that error is caused from the answer not being an array for some form of reason. You can change on line 540 of engine.quiz.php this:

PHP Code:

$Selected = (in_array($key,$Data) && trim($Data) != '')? " checked='checked'" : ""; 


To:

PHP Code:

$Selected = (@in_array($key,$Data) && trim($Data) != '')? " checked='checked'" : ""; 


It should solve the problem.

- Zero Tolerance