You need a license , you could try enable the grace period for licenses --license grace-period
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/nx-os/virtual_device_context/configuration/archive_601/vdc_nx-os_cfg/vdc_create.pdf
Licensing Requirements for VDCs
Without a license, the following restrictions will prevent you from creating additional VDCs:
- Only the default VDC can exist and no other VDC can be created.
- On all supported Supervisor modules, if you enable the default VDC as an admin VDC, you can only enable one nondefault VDC.