Trouble uploading website to github

Hi, I’m having trouble with github publishing my webpage. Get the Page not Found error. My project is here: I’m not sure if it is related to how I upload the documents, any help appreciated.

Go to settings section of your repository and choose master branch at the Source section and click save button after that refresh the page and you will be able to see the link of your page !. I faced this problem ( 404 ) too and the root cause was my file was named
Try this thing