CHECKOUT101: Checkout failed cart safe
What this means
Checkout did not finish, and the cart is still safe to retry.
Review the cart and retry checkout; the current cart contents have been preserved.
Your data
The order itself is safe and unchanged.
Troubleshoot
At the till — for the cashier:
- Review the cart — it is unchanged — and try checkout again.
- If it fails again, expand the log entry in Store health → Logs — the serverCode and status say whether the store refused the order and why.
- If the reason names a specific line item, remove it, complete the sale, and investigate that product afterwards.
On the store — for the site administrator: a repeated failure with a 500-class status is a site problem — check WooCommerce → Status → Logs for a PHP error at the failure time.