"Training Slide" crash on a specific "knowledge check"

[stevenwong951028]

Experience some crash on "Lesson 3: UEFI Drivers" training.

link: https://tianocore-training.github.io/Lesson-3/

When trying to answer the questions (knowledge check) at Topic 1, specifically the ones that requires trainees to drag "answers" into the correct "textboxes" (last 2 knowledge checks), nothing happened. No feedback upon clicking or dragging the "answers".

If decided to skip the question and proceed into the next slide (or any slides) will end up with pure blank slide.

Tried with chrome, chrome incognito mode, IE, and Edge. All produces the same result.

My current work around is:

1. Refreshing the whole page if end up at blank slide
2. Avoid entering & clicking the specific "knowledge check" slides