Sorry to resurrect a 6 month old thread, but I wondered if you figured out this problem.
I have the exact same thing happening to me right now after using the JQuery Validation to update a page created by the checkout wizard.
The checkout.php page was passing validation no matter what. Even with all blank fields. So I opened the JQ Validation (WA > Forms > JQ Validation) and clicked OK. That stripped out several lines at the bottom and now I get the spinning wheel "Please Wait..." It goes nowhere.
Not sure if this adds anything but I do get a console error on this page when checking the "Same As Billing" checkbox.
TypeError: el is null
if (el.tagName == "SELECT") {
It's referencing somewhere around line 300 on the paymentoptions.js page, created for a Payments Advanced checkout.
The link to that page is one of the things that is stripped out when running the JQ Validation update.
function wa_getFieldValue(el) {
if (el.tagName == "SELECT") {
return el.options[el.selectedIndex].value;
} else {
return el.value;
}
}
Thanks
TroyD