CMD + W doesn't work anymore (Macbook / Mojave)

Question

After installing the .dotfiles repo on my new Macbook (Mojave) the keyboard combination CMD + W to close tabs or windows stopped working.

I found out that when I press fn + CMD + W it works. How can I switch back to only using CMD + W?

Answer 1

Resolved by installing the dotfiles again. Still don't know what caused the problem…