HoloLens 2 Emulator Won't Launch

Error: DEP6100: The following unexpected error occurred during bootstrapping stage 'Connecting to the device '475D2000-0BFD-816F-5DFF-91985AF2F434'.': NullReferenceException - Object reference not set to an instance of an object. [0x80004003] App4

I've tried different versions of Visual Studio and different Windows SDK versions. Other Hyper-V VMs work, but this one doesn't even show up. The build works fine, but it fails to deploy every time.

Can someone please tell me how to fix it?