Author "Biographical Info" Is Not Showing In The Author Page

Hi there,

in your Customizer > Additional CSS you have this CSS rule:

body.archive header.page-header {
    display: none;
}

Which is hiding the archive header, which is also hiding your author archive header.

If you want to hide the header on all other archives but keep it in view for authors then change the CSS to this:

body.archive:not(.author) header.page-header {
    display: none;
}