Hi, I suspect that the cause of your problem is creating the widget in construction script. In general it’s not a good practice to create widgets from construction script, but you should do it on Begin Play. The construction script is called before the whole world is fully initialized and since my widget is spawning a niagara particle system into the world, I assume that’s what’s causing the crash. I’ll have to look into it to be sure, and if it’s the case I’ll implement a check for it into the next update. In the meantime please try moving your widget construction logic into begin play and let me know if that solved it. Cheers!