Errors when trying to run app locally on Mac

Hi! I followed the tutorial: to set up my FlutterFlow app locally on my Mac, but when I enter "flutter run" in my command line, I keep getting the error message: "Uncategorized (Xcode): Command CodeSign failed with a nonzero exit code

Could not build the application for the simulator.

Error launching application on iPhone 15."

Does anyone know how to fix this error and run my app locally? Do I need to go into a file and change some text? Please help me.