So i found a mistake on a open source website which is public on GitHub, so i cloned their repository and created a new branch "tutorial_fix" and changed to this branch, after this i corrected the mistake and committed to this branch. Then i tried to push my branch to GitHub, but i get "Can't connect to any URI". I am using GitEye.

You need to fork the branch on github, then clone it locally. After editing you push to your fork and make a pull request.