I think plugin need to be updated

Hi there, we have replied to your support query in the email. Please take a look. It is working perfectly fine when we uploaded one of our example BMI calculator.
See https://test.sucrotech.com/test-bmi-calculator/
So I’m sure it will work with your own calculator too. Thanks for reaching out to us.

Ok, It works now, thanks

One question: How to make embeded iframe of SSC calculator align center in full width page/post (no sidebar)?

Thank you for your question. A quick answer is to use Theme Preview.
See https://help.excelwraps.com/support/online-help/help-the-theme-preview-toolbar/

However, we don’t handle support via the review boards and we would like to suggest you to email your query to our support email [email protected]. There you should get prompt and detailed reply.