I am running the latest XO. I ended up fixing the issue, it has backed up successfully 2 times now without any errors. What I did was removed ALL snapshots for the specific VM. Once the tasks finished for removing the snapshots, I created a new manual snapshot. Then let the backup happen as normal. What I noticed though is the backup snapshot replaced my manual snapshot so the VM still only has 1 snapshot. But it seems to be working now.
