Problems with git commands

When running the commands git commit or git status i get this error:
What could be the problem here?

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None of the tipps in this Topic worked for me

What happens if you clone the repository in a new location and execute git status and git log?

Do you mean with cloning the repository using git fetch?

I mean clone in the sense of retrieving a completely fresh copy of your repository from our servers using git clone.
This way, you get a clean .git instance as the one in your old local repository is most likely corrupted (damaged).
(This might be due to an incorrect shutdown of the VM.)

git fetch only retrieves changes from our server to our local git repo.