How to remove the empty space under the form?

There's a space between my form and the footer.

The issue is related to the div where the form is embedded. 

Please try inserting the below CSS to your Custom CSS of the webpage:

.wpb_wrapper {

    margin-bottom: -35px!important;

}

That should bring the form up so the white space is not showing anymore:

Please try and let us know how it worked.

Thank you!

That worked. Thanks so much! :)