Hi,
I found the problem. You're using a child theme, and in the register.php function that registers the block it refers to the parent theme folder:
'render_template' => get_template_directory() . '/blocks/hero/template.php',
'enqueue_style' => get_template_directory_uri() . '/blocks/hero/style.css',
It should change to:
'render_template' => get_stylesheet_directory() . '/blocks/hero/template.php',
'enqueue_style' => get_stylesheet_directory_uri() . '/blocks/hero/style.css',
I made the change in your site and it works.
.
