Hi Brett
I’m not entirely sure what’s going on there, but from the looks of things a widget is registering itself incorrectly.
Page Builder itself doesn’t really manage widget and their includes, but if you have a widget in a plugin and properly register it using register_widget, Page Builder should handle it. What theme/plugin are you using to provide this widget?
All I can do on my side is make sure Page Builder handles this issue better. I’ve added a few lines of code to make it more robust against this sort of issue, but all it’ll do is ignore improperly defined widgets.