There are a number of issues with Azure cloud accounts in vRA 8. I currently have a bunch of critical SR's open with engineering though no fix has been provided at this stage.
Unfortunately it has made Azure completely unusable for us at this time.
I don't know that I've seen that particular error though. Is your Azure account least privilege? Have you tried just given it Owner/Contributor rights just to make sure it isn't a permissions issue?
Have you tried tailing the provisioning-service log while it's performing a data collection? It sounds like the snippet you've provided is just what the UI shows?
Privileges should be sufficient, Owner and Contributor roles assigned as in the referenced doc.
I checked the provisioning service logs and I saw SSL errors, more than likely caused by our SSL proxy I Need to get those fixed first, I believe.
Thanks for the suggestion, I'll report on the progress.
The problem was our internal proxy replacing certificates with its own.