Exception during request callback with id efaea963-e1c3-4f18-a1c7-c7136fa759c9 for item 10b0af59-d4f5-4360-b48c-57bcc036968c. Error Message: [Error code: 42000 ] – [Error Msg: Infrastructure service provider error]
As it turns out – this is a known bug (and apparently fixed in 6.1).
To fix this you need to change the locale of the IaaS server to “US”. In my case it is all set to UK
Once the IaaS server has rebooted – reconfigurations of the VM should work