If you are running docker in Bootcamp on an Intel-based Macbook, what this error is trying to tell you is that Virtualization features are not enabled. To enable Virtualization features inside Windows 10 in Bootcamp:
- Boot into Mac OS. Virtualization is automatically enabled if you boot up Mac OS.
- From there reboot into Windows without turning the Machine off.
Virtualization features will now also be available in Windows 10 and docker should work again.