GIT Commit and imported external git project path

Hi.
I had enabled GIT by enabling experimental features in the previous version (2.1.7).
Now with 2.2.0, I can see the GIT panel available directly.

I added composer to my project, added a library & then tried to commit all changes. But, the commit got stuck at below folder, saying path is invalid.

I think it might be because its adding a forward-slash at the end.
I checked my remote GIT folder, and I cannot see this folder or its contents, even though all child folders/files have been committed successfully.

Please help.