I've been trying to deploy a single-site development instance of ArcGIS Enterprise 10.7.1 through the Cloud Builder on Azure. One oddity during the process was that the Cloud Builder would not let me create new items such as a virtual network - I had to do this by going to the Azure Portal in my browser instead.
The error occurs after everything is set to go and I press 'finish' - it takes maybe 5 seconds or so before it reaches the step "Uploading automation artifacts', after which I get a 403 Forbidden error: ESRI.ArcGIS.Azure.IaaS.Jobs.DeploySiteWithAutomationJob.<StartJobAsync>d__14.MoveNext()
The subscription has the relevant permissions enabled, and a colleague in a different part of the world has managed to deploy ArcGIS Enterprise to our Azure instance (but in a different subscription). I've tried installing Cloud Builder on one of our servers as well, just to try and rule out some connection issue. Any advice is gratefully received.