quest bug

Hello people
New here and not sure where to put this post , but here i am !!!

I just started my new DK and when i get to the quest " Dwath Comes from on High" that tells you to obsreve some places , when i use the Eye of Acherus the ground is grey i cant see anything bellow , please help me !!!!

here is the section where to report Bugs: https://www.warmane.com/bugtracker
About that quest I can see there is already a report for MoP: https://www.warmane.com/bugtracker/report/648

alright thanks alot !!