Trouble creating linux backup

Hi,

I'm trying with little success to enable a backup on a Linux server I have running in Azure.

The server was uploaded as a VHD, not created from the Azure marketplace.

Linux version is Ubuntu 14.04 and has internet access

I have the following WALinuxAgent running:

WALinuxAgent-2.2.20 running on ubuntu 14.04
Python: 3.4.3
Goal state agent: 2.2.32.2

However I get the following error when trying to create the backup in the portal:

VM agent is unable to communicate with the Azure Backup Service

Code is: UserErrorGuestAgentStatusUnavailable

In the waagent log there is this error:

ERROR Event: name=WALinuxAgent, op=Provision, message=[ProvisionError] Giving up, ovf-env.xml was not copied to /var/lib/waagent/ovf-env.xml after 1800s, duration=0

There seems to be very little about this error when I search on Google for it in a backup context.

Any help would be very much appreciated.

Thanks

Scott