Hi,
I’ve suddenly had a load of failed orders.
When pressing ‘Place Order’ on the Checkout page, an error appears at the top of the page ‘Internal Server Error’
The order is created in WooCommerce, left as Payment Pending.
A similar issue hit the WooCommerce PayPal payment gateway the other day: https://github.com/woocommerce/woocommerce/issues/14956
This was a change on PayPal’s end which affected one of the ways that payments are done with WooCommerce – maybe it is something similar here?