Unable to display course

Hi, 

I am trying to complete Adobe Workfront - Sales Accreditation. I was able to go through almost all course that are part of this learning path and even completed the quiz but two courses I couldn't open:

- Competition and Objection Handling 

- Selling with Partners

I am using a MacBook Pro M1 Max and tried accessing the courses on both Safari and Google Chrome with no result - screen is blank and not displaying anything. I even tried opeing the couse on the Adobe Learning Manager app on Iphone and Ipad with same result. Are you please able to advise? 

Thanks!