Redirection not showing anything

First of all, thank you for this wonderful plugin. Love it.

Here is the issue that i am having. When i hit send at the very end, it should redirect to a page. but it lends in a blank page.

https://education.treaty8.ca/forms/treaty-8-education-symposium-2017/

Please try this to see what i meant.

Thank you.

[ No bumping please. ]