Beginner Mistake in Git -for Unity

I want to share one of the beginner mistakes while creating git.

git init

git remote add origin “https://github.com/name/projectfolder”

git add . ( after this command I couldn’t add my source to git and as highlighted the error occurs). I have tried more times but the error occurred. so to my surprise, I closed Unity and tried once again with

git add . — — — -worked for me