for some reason, when I create an app, I miss the 'grid' folder within resources/src/
I downloaded the ext js zip from the website, searched the grid folder, added this manually to my project, but then the whole project is ruined. I keep getting errors that files are missing.
when I just add the complete src folder from the zip to my project, I get these errors I don't understand.

I can't find anything online about this problem.
what am I doing wrong?