Gravity Forms: Override the submit action so that the form can be submitted even when an unexpected callback was returned

script.js

// In this scenario a ZIP was returned upon form submission, because Gravity Forms 
// does not expect this, the submit action is not reset.
// This snippet overrides the submit action.
document.addEventListener("DOMContentLoaded", function(){
    const form = document.querySelector('form.generate-template');
    const submit = form.querySelector('input.gform_button');
    submit.addEventListener('click', function() {
        form.submit();
    });
});