Stripe webhook delivery issues

Stripe sent the following email notification:

We’ve had some trouble sending requests in live mode to a webhook endpoint associated with your account…

The URL of the failing webhook endpoint is: https://x.com/wp-json/wc-stripe/v1/webhook

You (or someone on your team) configured your Stripe account to send events to that URL. You can change your account’s webhook endpoints from the Dashboard.

In most cases, a failing webhook does not impact your payments or payouts. However:

…If you use Checkout and rely on the checkout.session.completedevent as part of your purchase fulfillment process, you should review your completed payments to ensure you have fulfilled all recent purchases.

We’ve attempted to send event notifications to this endpoint 23 times since the first failure on January 1, 2023 at 10:57:19 PM UTC. If this endpoint is important to your application, please try and fix the issue. If you do not need this webhook endpoint, you can remove it from your Stripe webhook settings. We will stop sending event notifications to this webhook endpoint by January 10, 2023 at 10:57:19 PM UTC.

Here is the summary of errors we received while attempting to send webhook events:

23 requests had other errors while sending the webhook event.

You need to return any status code between HTTP 200 to 299 for Stripe to consider the webhook event successfully delivered.

…

This might be something new from Stripe, as it started on Jan 1st? Or did the webhook secret expire at the end of the year? What should we do, generate a new secret key?

Thanks.