I have a error when i launch editor (screenshot is attached). In this blueprint i have a child actor component. And joke is when i launch editor without blueprint ( in screenshot) and add manualy when editor is open, all work fine without any error like this. I try search and all i found is a try create new project and add all content to a new project, but it did not work.
If you are using 4.14, there is a known issue with ChildActorComponents being cast to a parent that can result in a fatal error like the one you described (UE-39323). This was fixed for 4.15.
If you are using the Master branch on GitHub, could you provide some additional information about how you are setting this up so I can try to reproduce the error myself?
