This is a SnapDrive error not a SnapCreator error
VMs are tricky especially if you are using virtual disks, I dont think SnapDrive can backup virtual disks but you would have to check IMT for what it supports.
You could use SC to backup the VM or VSC and then just forget about SnapDrive. SC if you go that route can do a federated backup where it uses vmwware plugin (vibe) to take vmware snapshot, then quiesces you app in VM, and then takes netapp snapshot. As long as app is installed in VM and not using virtual disks this should work.
Another option is go RDM and just backup the app separately from VM, this is recommended best practice.
Using virtual disks while nice for management is a nightmare to try and backup unfortunately.