Reply To: Fix Issue

Hello,

Firstly, to clear your doubt that it is not a Theme end issue, here is our Test Site URL where you can try checking out and you will see that the Checkout processing is working fine: https://blackpearlspro.com/woodmart_support/checkout/

Here is the after Checkout processing Thank You page link from the Test Site too:
https://blackpearlspro.com/woodmart_support/checkout/order-received/10006/?key=wc_order_yjoVxJtoW3mt7

So, this thing is specifically happening on your Site. Earlier, when we shared the Screenshot with you was the Error being generated on your Site related to that iThink plugin so we shared that with you. If you are still facing an issue after deactivating that plugin then kindly once check this concern with the default WP Theme activated on your Site like Twenty Twenty Three or Storefront and then check back the concern again.

If the issue doesn’t persist with the default Theme activation, then kindly please take complete Backup of your Site first, then provide us the WP-ADMIN Login details of your Site in the Private Content field with the permission to completely debug your Site which includes deactivating all the third party Plugins and removal of on-Site Customization changes too, so that we can thoroughly check this issue on your Site and assist you accordingly.

Best Regards