> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lynq.am/llms.txt
> Use this file to discover all available pages before exploring further.

# Errors and troubleshooting

> Resolve Checkout and webhook integration problems.

# Errors and troubleshooting

| Code                                                                 | Resolution                                                                            |
| -------------------------------------------------------------------- | ------------------------------------------------------------------------------------- |
| `CHECKOUT_CONFIGURATION_ERROR`                                       | Check the publishable key and client secret; create a fresh Payment Intent if needed. |
| `CHECKOUT_SESSION_UNAVAILABLE`                                       | Create a fresh Payment Intent.                                                        |
| `CHECKOUT_NETWORK_ERROR`, `CHECKOUT_UNAVAILABLE`, `CHECKOUT_TIMEOUT` | Offer retry when `retryable` is true.                                                 |
| `CHECKOUT_NO_PAYMENT_METHODS`                                        | Configure and enable a payment method for the current environment.                    |

For `MountError`, ensure the target element exists, the instance is not destroyed or already mounted, and no other Lynq Checkout is mounted on the page.

For a failed webhook, check the endpoint URL, environment, enabled state, response status, and delivery log in Dashboard.


## Related topics

- [Checkout events and errors](/build/checkout-events.md)
- [Checkout SDK reference](/reference/checkout-sdk.md)
- [Checkout SDK](/build/checkout-sdk.md)
- [Support](/resources/support.md)