I hope you are doing well. Can you tell me more about your setup and what’s failing?
Are you using Windows? What’s your Arduino IDE version?
There’s already a discussion here that might help: https://rntlab.com/question/not-able-to-install-esp32-on-arduino-ide-using-git/
I’m also working on updating the course to include those tips (make sure you are running Git GUI as and administrator and that you have the latest version of the Arduino IDE installed).