In the dropdown menu of Repository, you can see there is a button named Open in Git Bash (Ctrl + `),
when I click it, I got a warning saying:
Unable to locate Git
We were unable to locate Git on your system. This means you won't be able to execute any Git commands in the command prompt.
To help you get Git installed and configured for your operating system, we have some external resources available.
The problem is that I have already downloaded the latest Git from git-scm.com.
To conclude, how should I configure my Github Desktop or Git Bash (MingW) to make this button (Open in Git Bash) work?