HeeHooWalks

Hi I have installed the Mindbody Branded Tools class styles widget to my squarespace page. Clients can book a class no problem however at the end of the booking clients are re-directed to a 404 error page. I have gone to design settings in squarespace so that when a 404 error page comes up clients are re-directed to our home page instead. But that setting doesn't work and squarespace support say they can't help as it is a coding problem caused by the widget. Any ideas? Thanks