I know I can do so for the Preptests, but can I see all the questions I missed on Problem Sets?

I struggled to get this game down and was wondering if some of you have encountered similar games in the past which might help me hone in on general skills.

Hi I took a preptest recently and a blot of my answers were blank when I went into the Blind Review part. Why does this happen and is there a way to make sure it doesn’t happen again?