I have been trying all day to create a new Notification Hub & Namespace, both using the CLI and Azure Portal. Every time (except once), they always fail. When I do az notification-hub namespace show, the "provisioningState": "Failed" is always returned. In the Portal UI, the Location is also empty. I can't use the Portal to change anything (get 404 errors when I try to save). I try to delete the incomplete resource, and it seems to go away, but within 5 minutes later, it suddenly shows back up in my resource group (so I can't actually delete them).
Is there some service issue going on? I've tried multiple resource groups, multiple subscripts, different Azure accounts--all with the same result.