I am pretty new to Veeam so im hoping you gurus here will have some patience for my questions

Ok so all backups in Veeam are running fine and all created in the same way.
Only one box which our devs are using seems to pop up an error every night and does not perform a backup.
Here is the VM summary:
0 of 0 files processed
Total VM size: 136.49 GB
Processed size: 0.00 KB
Processing rate: 0 KB/s
Backup mode: SAN/NBD without changed block tracking
Start time: 27/05/2010 7:32:26 PM
End time: 27/05/2010 7:32:34 PM
Duration: 0:00:08
Creating snapshot
CreateSnapshot failed, vmRef "vm-166", timeout "1800000", snName "VEEAM BACKUP TEMPORARY SNAPSHOT", snDescription "Please do not delete this snapshot. It is being used by Veeam Backup.", memory "False", quiesce "True"
A general system error occurred: Protocol error from VMX.
Looking at the snapshot manager in vCenter i dont see any snapshots there.
Really hoping someone will be able to assist here as im quite baffled by this.