GitHub error "fatal: bad config file line 1 in .git/config" when in git shell

I solved this by

1. open .git/config file
2. clear all the NULL values in the file
3. save and close the file
4. git add .

My question might have been abit vague, but I wasnt sure myself what happened. I solved it by finding .git/config file on my laptop using Windows search , and deleting it. Then I deleted content of my github folder and cloned the repo again and it worked after :)