Issue with phpmyadmin

A friend of mine made the database for my website:
It results that when we uploaded the database in phpmyadmin, it appears and error:

The mbstring PHP extension was not found and you seem to be using a multibyte charset. Without the mbstring extension phpMyAdmin is unable to split strings correctly and it may result in unexpected results.

I was told that was an extension problem…that means we have to make the database AGAIN??? isn’t it possible another way to fix this?

Or you can try to install your own PHP

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