product online configuration not working

Hello,
The screenshot I attached in my previous message in from backend not frontend. If you still find the issues, please share your backend & frontend login credentials via Contact us form, We'll look into it.

How did you open a preview of the product's vdesigner layout in the back-end? I cannot find it anywhere.

At backend in product details, you will find it under 'Custom Fields' tab. Please find the attachment.

Thanks, I'm able to find the configuration without any problems. I'm trying to figure out how you rendered the preview in the back-end. You posted the attached image showing this and I'm puzzled by how this was achieved.