How can I change the text of Hero Section

Hi,

How can I change the text of Hero Section?

The entered characters are not saved and therefore will not be reflected.
It is layout 2.

test page

I think that there is a possibility that the customization of the Smart Slider before may affect this.
What can I do to make it work properly?

I am set up using OnePress as a child theme.
(but not using section-hero.php)

thanks for any help.