organization repo can't deploy

I did many things to show my project on github pages but it didn’t work. 

I followed this step by step. But when open my github pages, there is only white page. Maybe it works but can’t show anything

It works on localhost well.

Is organization repo can’t deploy on github pages??  This is our github pages

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It seems it is not possible and you have to create machine account to do it.

I don’t understand exactly why it is not working, but it seems to be the case.