Its super easy to reproduce. All I have to do is create a widget, uncomment the UMG line in the C# file to use UMG source, and compile. I don’t know if it makes any difference if its from inside the editor or not. It doesn’t seem to matter. I have done a complete workspace recompile in CodeLite and running it will still crash the editor. It will load but when I try to run it, it will crash saying that it caught a signal -11. I even reversed all the changes before I added anything to my project that resulted in a crash and did a full rebuild of the entire workspace again in CodeLite and got the same issue. The tutorial does not have me add changes to the source. I do all the changes graphically in the UMG editor after making a blueprint out of it.