[heroku] 'heroku' does not appear to be a git repository

Might be worth checking the config file in the .git folder. If the heroku parameters are missing then you´ll get this error heroku param

[remote "heroku"]
    url = [email protected]:`[Your heroku app].git
    fetch = +refs/heads/*:refs/remotes/heroku/*

the .git folder should be in the local computer file directory for the app you created in heroku. e.g C:\Users\You\Your app.git

Hope this helps