Amazon pay endpoint failure since woocommerce 9.0.0 or later

Describe the bug Using endpoints to Authorize or Capture is getting this error:

{
    "code": "rest_no_route",
    "message": "No route was found matching the URL and request method.",
    "data": {
        "status": 404
    }
}

To Reproduce Steps to reproduce the behavior:

Setup Amazon Pay option "Payment Capture" to "Don't Authorize the payment..." and Save
Update Woocommerce to the latest version 9.0 or later
On an incognito with a guest or logged user purchase a product with Amazon Pay
With Postman or other tool, execute the POST request enpoint to Authorize the order {{DOMAIN}}wp-json/wc/v1/orders/{{ORDERID}}/amazon-payments-advanced/authorize

Expected behavior Amazon Pay enpoint should work without problem

Isolating the problem (mark completed items with an [x]):

[x] I have deactivated other plugins and confirmed this bug occurs when only the extension is active.
[x] I can reproduce this bug consistently using the steps above.

woocommerce / woocommerce-gateway-amazon-pay