Can not get value from field.

Hi,

You're trying to get field value from a group, so please try this:

$hero = rwmb_meta( 'home__hero' );
if ( ! empty( $hero ) ) {
    $h4 = isset( $hero['rw_hometemp-hero-h4'] ) ? $hero['rw_hometemp-hero-h4'] : '';
    echo $h4;
}