I believe there is some migration going on for AAU. A new portal was being introduced. I think that might be a reason 

Hi @Enab 2226 ,

Please find the below,

The time has arrived, and we are moving to the new Learning Platform. Please note that the platform will be unavailable for learners from Jan 12th 6:00 PM Pacific Standard Time to Jan 17th 12:00 PM Pacific Standard Time as we initiate this transition. We appreciate your patience as we switch platforms to give you the optimal learning experience

@Zaid Chougle  check now the new platform conversion completed and you tried during migration process