UE4 4.27 editor freeze when changing scalability setting

As the title says the 4.27.2 editor freeze when hovering the scalability settings button. It is exactly the same issue like this: UE4 4.27 out of memory crash on opening scalability window - YouTube, but the editor doesn’t crash because out of ram.
I watched the process in the task manager when I try to change that, the editor got suspended then did not respond.
I can’t rid of that issue for months.

I tested on another computer as well, but everything is fine on that. I even reinstalled the Win 10, Epic Games Launcher, and the engine too.

Any ideas how to fix it?

I found this problem was due to a massive shader compile getting ready. Literally locked up for about 5 mins, and then spent 45 mins compiling shaders.

Could it be that?

Thank you for the reply.

I let it compile for hours but don’t get it done, so I think something different going on here.

I forget to mention that when I also open a brand new project the scalability setting is always low at default.

The scalability is an engine setting, so the new project being low makes sense.

In the 4.26 project, the default scalability setting is:

And in the 4.27 project, the default scalability setting is low:

Then when I just try to open that setting it just freezes the editor.

Hmm, hard to know. Did you try verifying the engine?


( long shot ).

Yes, I did everything is possible to get it working, even tried to copy this engine from a computer that has no issue with that, but no luck.

What is the spec of the problem machine?


Hmm, looks ok - I’m out of ideas for the minute… :-/