IndexError: list index out of range

[julien-duponchelle]

https://sentry.io/gns3/gns3-server/issues/165127388/

IndexError: list index out of range
  File "./gns3-server\gns3server\web\route.py", line 197, in control_schema
  File "./gns3-server\gns3server\handlers\api\controller\gns3_vm_handler.py", line 54, in get_vms
  File "./gns3-server\gns3server\controller\gns3vm\__init__.py", line 221, in list
  File "./gns3-server\gns3server\controller\gns3vm\virtualbox_gns3_vm.py", line 151, in list
  File "./gns3-server\gns3server\compute\virtualbox\__init__.py", line 176, in list_vms

IndexError: list index out of range