[windows] msys2 commands fzf.vim Ag not working

[NB216ers]

• [ ] I have fzf 0.30.0 or above
• [x] I have read through https://github.com/junegunn/fzf.vim/blob/master/README.md
• [ ] I have read through https://github.com/junegunn/fzf/blob/master/README-VIM.md
• [x] I have read through the manual page of fzf (man fzf)
• [x] I have searched through the existing issues

I open nvim in msys2 and use the ag command:

The ^ character added。

If I execute ag directly in msys2，it works。