Cannot Rebuild Solution / Package game "No such file or directory"

guys, i’m in despair. I downloaded zip ue4 project and it works fine. After that i copy several .cpp/.h files into main project + several bp via “migrate” option. After that i edited Macro Names like"Projname_API". All was good and desired mechanic from first project starts work in main proj. Problem is : i can build solution and play in editor, but i cant package or rebuild solution at all. Error sounds like “Runnable.h: No such file or directory” . I wrote correct path in c++ includes in project settings, but it didnt solve my problem. First downloaded project rebuilds fine and w/o any issues.
Rly need help, i spend about 9 hours today with this problem. :frowning: need advice