How do I troubleshoot a jQuery/AJAX issue? On a current Drupal Commerce installation, I just started experiencing issues where a field is not updating after a jQuery click event. 

When a user selects an option, the price typically updates for several of the products on our store. When adding the item to the cart, the correct price is shown. (While helpful on my end that the customer is being charged the right price, it's not great that they cannot see the right price until it is in the cart.)

Everything was working well. No updates were pushed for our distribution and added modules, but this feature is no longer working. 

From the Chrome Console, I pulled the error msgs below. How do I troubleshoot? Should I just restore a backup?

ui.spinner.min.js:7 Uncaught TypeError: Cannot read property 'msie' of undefined
at ui.spinner.min.js:7
at ui.spinner.min.js:22


jquery.formalize.js:13 Uncaught TypeError: Cannot read property 'msie' of undefined
    at jquery.formalize.js:13
    at jquery.formalize.js:135
commerce_kickstart_product_ui.js:6 Uncaught TypeError: $(...).spinner is not a function
    at Object.attach (commerce_kickstart_product_ui.js:6)
    at Object.&lt;anonymous&gt; (drupal.js:76)
    at Function.each (jquery.min.js:4)
    at Object.Drupal.attachBehaviors (drupal.js:74)
    at HTMLDocument.&lt;anonymous&gt; (drupal.js:504)
    at c (jquery.min.js:4)
    at Object.fireWith [as resolveWith] (jquery.min.js:4)
    at Function.ready (jquery.min.js:4)
    at HTMLDocument.q (jquery.min.js:4)
It is because you are using jQuery 1.9 or superior.

To fix it, use jQuery Update version 7.x-3.0 and enable the jQuery Migrate plugin.