Yes I have tried this and also refreshing all nodes to no avail. I even unplugged the collapsed node completely and it still throws an error on launch. The strange thing is that inside the collapsed node there is no error on any of the nodes. The error reference opens the collapsed node in a new tab but does not point me to any node specifically. Also if I expand the collapsed node and then compile unreal crashes completely. I’m installing debugging symbols now so I can see what the crash log says.