This is a regression. Tested in //UE4/Release-4.27 CL#18319896
Fatal Error when setting S RGB to true on a Texture 2D from a Render Target Create Static Texture Editor Only node.
No Crash when the SRGB is set to true
Editor Crashes with a fatal error:
Use an Editor Utilities Blueprint instead of a regular BP and then use the SetEditorProperty node to set the SRGB property of the texture.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-155909 in the post.