Project failing to load multiple cameras

Using fixed camera angles similar to Resident Evil 1. Created camera class using C++ following the tutorial here UE4 C++ Tutorial - Classic Camera System (Resi/Dino Crisis) - YouTube

After I’ve placed the cameras in the level, compiled and saved, the next time I open the project I have a ‘CreateExport’ error for each camera. Followed other ‘CreateExport’ error threads and nothing has helped, any ideas to fix this (C++ only)?