GIT: Cannot commit any file
I've installed Git and associated my site with a new Git repository, but I cannot commit any file. Here are some pictures of my preferences

My Git preferences

My Site preferences
My Git installation should be okay, I can open a Git Terminal for example


And the repository is shown as master

Activating the Status checkbox should select every file because this is a fresh repository without any commits - but it doesn't work

When I select a file manually the Commit-Button is still grayed out, I am not able to commit any file.
Please help me to solve this problem.
