what version of vdp are you running ? Logs show avtar version 7.1.181-107 which I think it's early VDP 6.0 ?
My advice is this, try to take a snapshot of the VM. See if that works. If it does, then you know it's not snapshot related.
I would also look into updating VDP to the latest. It's EOL and most likely you won't get much support soon, but I know people who are still using it with Vcenter 6.5 with no issues.