brew install报错Error: No developer tools installed. Error: Command failed with exit 128: git

• Let's solve the first problem first

Error: No developer tools installed.
Install the Command Line Tools:
xcode-select --install

xcode-select --install

• Then upgrade brew, a warning appears. Then try to install tree again

brew update
brew install tree

• The following error occurs:

fatal: not in a git directory
Error: Command failed with exit 128: git

• Type in terminal

brew -v

Homebrew 3.6.20
fatal: detected dubious ownership in repository at '/opt/homebrew/Library/Taps/homebrew/homebrew-core'
To add an exception for this directory, call:
git config --global --add safe.directory /opt/homebrew/Library/Taps/homebrew/homebrew-core
Homebrew/homebrew-core (no Git repository)
fatal: detected dubious ownership in repository at '/opt/homebrew/Library/Taps/homebrew/homebrew-cask'
To add an exception for this directory, call:
git config --global --add safe.directory /opt/homebrew/Library/Taps/homebrew/homebrew-cask
Homebrew/homebrew-cask (no Git repository)

• 按照他给出的解决方法输入如下命令

git config --global --add safe.directory /opt/homebrew/Library/Taps/homebrew/homebrew-core

git config --global --add safe.directory /opt/homebrew/Library/Taps/homebrew/homebrew-cask

• 虽然有警告，但是brew install tree成功了