Causing Elementor forms to not work

Food store is causing Elementor forms to not submit. There is a console error stating:

Uncaught TypeError: settings.data.indexOf is not a function
    at HTMLDocument.eval (eval at <anonymous> (www.grubs-up.com/:1:1), <anonymous>:1:3641)
    at HTMLDocument.dispatch (eval at <anonymous> (www.grubs-up.com/:1:1), <anonymous>:1:43064)
    at y.handle (eval at <anonymous> (www.grubs-up.com/:1:1), <anonymous>:1:41048)
    at Object.trigger (eval at <anonymous> (www.grubs-up.com/:1:1), <anonymous>:1:71659)
    at Function.ajax (eval at <anonymous> (www.grubs-up.com/:1:1), <anonymous>:1:78306)
    at s.ajax.s.ajax (eval at <anonymous> (www.grubs-up.com/:1:1), <anonymous>:1:3931)
    at child.handleSubmit (form.72b77b99d67b130634d2.bundle.min.js:2:4987)
    at e.each.r.<computed> (eval at <anonymous> (www.grubs-up.com/:1:1), <anonymous>:2:9876)
    at HTMLFormElement.dispatch (eval at <anonymous> (www.grubs-up.com/:1:1), <anonymous>:1:43064)
    at y.handle (eval at <anonymous> (www.grubs-up.com/:1:1), <anonymous>:1:41048)

The page I need help with: [log in to see the link]