subscription-manager register fails

I signed up for a red hat developer account today. I downloaded redhat 8 and running it in vmware fusion on a mac. I do subscription-manager register. Then enter my username and pwd. It then responds back:
'NoneType' object is not subscriptable

I saw this on the web saying this was fixed, is a dns issue and various other things. I'm obviously resolving dns if I can browse in firefox. I tried some of the other things but I always get this issue. I've also tried reinstalling but no luck.

Any suggestions?