Error with git: " already exists and is not a valid git repo"

Question

It is seying that I cannot do this:

 git submodule add -f [email protected]:thephpleague/oauth2-server.git libs/OAuth/functions

Because of this:

'libs/OAuth/functions' already exists and is not a valid git repo

I just don't get it. It does not exists anywhere. Is there another git config file hidden on my computer that I don't know of or something? I tried deleting .git and pulling everything again that did not do anything. Any ideas?

I also tried this:

git ls-files --stage functions

When I was inside of libs/OAuth and I got nothing.

Then I tried this:

sudo git rm --cached functions

I got this error:

fatal: pathspec 'functions' did not match any files

I also tried this:

sudo git rm -r --cached functions

And got the same previous error.

Answer 1

In case someone else had a similar case as mine and was struggling with this as I was because of a stupid reason:

Check if for any reason the file doesn't already exists (I had a failed git subomdule add previously)

So in the context of the question rm the file:

rm -rf libs/OAuth/functions

And then try to re add