Unable to connect to github.com on push and pull

Why does this error happen when I try to push to github?
I have checked with ping and tracert and the Github connection is well
but when I want to push something to Github this error is displayed.
Please tell me what I should do to solve this error.

I am using Windows 7 and HTTPS with Github:

$ git push origin master fatal: unable to connect to github.com: github.com[0: 192.30.252.131]: errno=No error

Thanks

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