Operating system: Windows 10
Graphics card: GTX 960
Short description of error
In the Blender VSE, the way to incorporate the 3D View Render was to go to Add > Scene > (select the relevant Scene). However, this option in Blender 2.80 seems to always show up blank. So, you have to first render out the 3D View images and then add them into the VSE separately (as an Image Sequence or movie).
Exact steps for others to reproduce the error
Open Blender 2.8
Go to VSE
Go Add > Scene and see that you cannot add your Scene.