Nate wrote@[cancellato] I'm not sure what's going on there. Mario will be along soon to help out. You might want to create a new thread for your specific problem, so it doesn't get lost in the general 4.0 release discussion.
OK, i will wait for him in another topic at "Bugs" section.
So, I recommend all of UE Editor 4.26 users do not update for 4.0 right now, because it's have an issue with plugin's building stage