Not able to create topic for TF-AT Course 1 Week 4 - "New Topic" greyed out

I try to create new topic for the course TF-AT Course 1 Week 4, bu accesing page:
DeepLearning.AI , but “+Create New Topic” greyed out (see enclsed image.

Also the course “TF-AT Course 1 Week 4” is not available in the dropdown list.
So could you please support me on how to create a topic for the catgory.
/Thanks Tomas