[Theme Horse Support Team]

Hi ermenegildo.iussa,

We have moved our theme options settings to customizer due to change of WordPress guidelines. We have only changed the global settings value. If you are using this below code in your child theme:
Replace below code

global $interface_theme_default;
$options = $interface_theme_default;

and use

global $options, $array_of_default_settings;
  $options = wp_parse_args( get_option( 'interface_theme_options', array() ), interface_get_option_defaults());

If you are having this issue in your child theme then you can download from here the old version.

Thank You!