Issue started occuring a few days ago... no idea why.
When a user is purchasing a package through woocommerce, they press "Place Order" and the page just sits there with no error messages. The "Place Order" button becomes clickable again so they click it.
Everytime they click it, an oder is placed on the backend and credit card charged. On the front end, they don't know this and keep clicking Place Order
Chrome Inspect shows AJAX error, sitename.com/checkout/?wc-ajax=checkout
If I enter that into a browser I get the following error.