I can access Github Homepage at the moment.
Look at your browser for typo, it should be
https://github.com.
If you still can't, try to flush your dns cache by opening a command promp, type
ipconfig /flushdns then press enter.
Your screenshot looks like an unloaded CSS script caused by
slow connection or failed DNS lookup.Yes thanks. So now I am in public library using laptop, there wireless network maybe connected so many people.
So after I change internet to my private portable wi-fi router, page shows normally.