How to reconnect database to existing wordpress multisite setup after changing site name

I found that I was performed all things right. And when I checked http://localhost/mysite/wp-config, it was working well only my home page was showing white page. Other sites in multisite wordpress setup was working good.

I just login my site, went to site network and edited the site title which I was changed before install. Then I just changed the theme again. I published properly with older theme.

My question is also an answer for the same question.

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