Cannot open include file: ‘Character/WhiteCube.h’: No such file or directory
It seems you have an #include Character/WhiteCube.h statement in WhiteCube.cpp but it cannot find the file. I would start by making sure that the include actually points to an exsiting file (i.e., that it actually reflects the folder structure in your project).
If you have created files and then moved them around or renamed them, sometimes the includes are not updated.
Edit: I don’t use Visual Studio that much so I wasn’t aware, but it seems it can sometimes create the cpp and the h file in the same folder, but mess up the include. If your files are in the same folder, you can try #include WhiteCube.h instead an see if that works 