Problems with an AAI lesson (week 4 of 8)

I am running the AAI training (Authorized Instructor) and I am running the week 4 and it show me empty (blank). I jump to previous and next week on the same course and it works! I test on 2 browsers (last version of Chrome and Firefox), different network (mobile and at home). If you like to have a meeting, let me know via email your availability. https://explore.skillbuilder.aws/learn/course/15322/play/78249/week-4-aai-candidate-onboarding-for-externals