Woocommerce Stripe webhook failing

Hello,
We received an email from Stripe saying that they have some trouble sending requests to a webhook endpoint associated with our stripe account account in test mode.
Do I need to worry about this since it says the ‘account in test mode’?
Currently test mode is disabled (and we don’t need this since it’s live), the live mode is enabled.
If ‘test mode’ is important too, how can this be fixed?

Below is the full message from stripe:

We’re contacting you because we’ve had some trouble sending requests to a webhook endpoint associated with your Main account account in test mode. Webhooks are used to notify your server about events that happen in your Stripe account, such as a payout completing or an invoice being created. The failing webhook endpoint is https://xxxx.com/?wc-api=wc_stripe.

You or someone on your team has added that endpoint in your Stripe webhook settings, which you can view and edit here: https://dashboard.stripe.com/account/webhooks.

Please note that in most cases a failing webhook does not impact your payments or payouts. However, if you use subscriptions we rely on your webhook endpoint to notify you of new invoices. These invoices may be delayed for up to three days if your webhook is unable to successfully receive them. If you use Checkout, you may be handling the checkout.session.completed event as part of your purchase fulfillment process as described here: https://stripe.com/docs/payments/checkout/fulfillment#webhooks. If you do, failure to handle these events may interfere with purchase fulfillment.

We’ve attempted to notify the endpoint 26 times since October 14, 2020 at 09:57PM. If this endpoint is important to your application, please try and fix the issue. If you do not need the webhook endpoint you can delete it from your Stripe webhook settings. We will stop sending notifications to your webhook by October 23, 2020 around 09:57PM.

Here is the summary of errors we have received when sending you webhooks:
* 26 requests had other errors while sending the webhook.

You need to return anything between a HTTP 200 to 299 for the webhook to be considered successfully delivered.
For more details on the errors, you can find your events page here: https://dashboard.stripe.com/test/events.

Thanks!