Need Help: Superforms Submit Button Not Working with sf-step Attribute

hey all, need a little help with something I am using superforms for a multistep form on my site (Read only link) and for some reason i cant figure out, as soon as i add the sf-step attribute, the submit button no longer works. I’ve used superforms many times before to great success and cannot for the life of me figure out what the issue is. It must be something blindly straightforward that im missing. can anyone help? thanks