Remote Desktop Virtualization Host could not create the differencing virtual disk named %1 from the parent virtual disk named ...

Remote Desktop Virtualization Host could not create the differencing virtual disk named %1 from the parent virtual disk named %2 while running a provisioning request for the shared virtual desktop collection named %3. 

Differencing virtual disk name: %1
Parent virtual disk name: %2
Shared virtual desktop collection name: %3
Hresult: %4