Unable to open holographic emulation window

Steps to Repro:
1. Open attached or create a new project
2. Switch platform to Windows universal platform
3. Edit > Project Settings
4. Player Settings > XR Settings
5. Enable virtual reality supported
6. Window > XR
7. holographic emulation

Actual Result:
1. The error appears in the console
2. The window doesn't open

Note: Make virtual reality SDK is set to Windows Mixed Reality

Working with:
2018.2.0b2, 2018.1.0f2

Occurring with:
2018.2.0b3, 2018.3.0a1

Environment:
Only Windows

Stack Trace:
Couldn't call method Init because the class HolographicEmulationWindow or method couldn't be found.