Errors logged in developer console for graded question slides

Good Day All,

I had similar errors when running my course and after a lengthy debugging (I still do not know why) I got it to work. It seems that using gradient type and/or colors when formatting your objects could be the primary reason for this error.

I had a slide that used gradients to format the buttons then executing a slide with no gradient formatting and the error kept appearing. I then bypassed the slide with gradient formatting and went directly to the slide with no gradient formatting and the error was gone.

I will be redesigning the gradient formatted slide not to use gradient type and colors on buttons. Not sure if this will help to find a solutions to the problem developers are experiencing.