URL redirect on form completion not working

On my completion screen, I have a button that redirects the user to another page within my website directory. Unfortunately, this button will not redirect the user to the URL specified in my Typeform “Create” tab. 

I’ve done some research and I believe this is because the iFrame is sandboxed can cannot navigate to the parent page “classification”.

I’ve tried the proposed solutions here but they did not work: 

Any help I can get with this would be greatly appreciated. For reference I am using GoDaddy websites to build this website.

Thanks