Hi there,
I see two issues, you added this to your custom javascript which shouldn’t be, I went ahead and removed this.
<meta name="google-site-verification" content="DJwqgyK-tifcvrOOQkIHr271hkgOR4yotoFbGgJJ350" />
Plus, this code is added to your responsive text selector, I also removed it. You should only add a selector there which is .h-custom-headline, .h-feature-headline, .entry-title and and not the entire PHP code.
add_action(‘wp_footer’, function() {echo do_shortcode( ‘[responsive_text selector=”.h-custom-headline, .h-feature-headline, .entry-title” compression=”1.5″ min_size=”20px” max_size=”90px”]’ );});
With these removed, the preview is properly loading now.
Thanks!