Export to GitHub failed with error: Method GET to endpoint https://github.com/

Export to GitHub failed with error: Method GET to endpoint https://github.com/Phpyouth/repos/Phpyouth/Phpyouth.github.io/git/refs/heads/master failed with error: Unknown error

I am getting this error when i try to Export to GitHub.
I have created a token with public_repo scope and filled every field correctly.
Still I am getting this error.

My Repository is Phpyouth/Phpyouth.github.io
https://github.com/Phpyouth

Please check this

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