What are you trying to do¿ The source file of your project? Is your project a C++ ue4 project? If you just made a project using BP Blueprints of course you don’t have any source files. You have to add using for example the ue4 editor.
What are you trying to do¿ The source file of your project? Is your project a C++ ue4 project? If you just made a project using BP Blueprints of course you don’t have any source files. You have to add using for example the ue4 editor.