I'm getting errors when I try to connect to our Zuora data. I'm able to enter by account information correctly, but when the report is actually trying to load I get this error.
I cannot repro the same issue as you on my side. After i enter my Zuora account, the report can be loaded properly as below.
I suggest you to create a support ticket at http://support.powerbi.com (see bottom of page).If issue is resolved, you can share the solution here later to help others who have the same problem.
I tried again and it went through just fine. Interesting.
Thanks for your help.