错误：
8:17 Can’t start Git: git.exe
Probably the path to Git executable is not valid. Fix it.
18:17 Invalid VCS root mapping
The directory C:\Users\paula\Git\OpenTripPlanner is registered as a Git root, but no Git repositories were found there.
Configure
解决办法：
如图所示，检查git.exe的路径是否设置对了。（git下载地址：https://git-scm.com/download/win）