UE4 Scalability hang/freeze

Hi,

I recently tried changing the scalability settings and as soon as I change any of the scalability settings, such as the material quality or engine scalability the editor completely freezes up, I could be going from Epic to low and it would freeze up. Generaly it starts with trying to compile shaders but then the editor hangs forever, I have left it 30 min and then forced closed the editor.

When trying to open the editor into the same project, the editor gets to about %64 on the load timer and then freezes. it seems in the task manager that multiple shader compilers are taking up alot of memory and power usage.

I am using a VRExtenshions plugin:
https://forums.unrealengine.com/development-discussion/vr-ar-development/89050-vr-expansion-plugin
other than that my editor is pretty normal, and so far I have not been doing anything particularly special with blueprints or shaders so I am curious as to what might be causing this.

Many thanks.

I’m having a similar problem with 4.27. Just opening the Settings dropdown from the toolbar and hovering over the Engine Scalability Settings option causes my editor to lock up. I’m also using the VRExpansionPlugin, https://vreue4.com/, but the problem persists when I turn it off.