Custom domain: https protocol not supported

Hi,

I followed the directions here: https://www.jotform.com/help/144-How-to-use-Custom-Domains-with-Jotform so that https://form.jotform.com/80514662122145 becomes a landing page for my site, PetSitApp.com at: https://forms.petsitapp.com/form/80514662122145 

But, Google says this page is unsafe and not secure. Why? And how do I fix that?

The reason for this error is that you are trying to access your domain over https

For example:

https://forms.petsitapp.com/form/80514662122145

Custom domains in JotForm do not support the https protocol

You must use the regular http protocol instead

For example:

http://forms.petsitapp.com/form/80514662122145