在WordPress中重写WooCommerce API V2 URL的URL不起作用

I have a WordPress site setup with WooCommerce. The site is hosted on a Nginx server with PHP 7.2.

The problem I face is that external API calls to the site do not work.

For example, a call to the WC API V2 as: https://www.custommadewraps.com/wc-api/v2/orders?consumer_secret=cs_&consumer_key=ck_

Reports:

{"errors":[{"code":"woocommerce_api_authentication_error","message":"Consumer key 
is missing."}]}

But the consumer key is there in the query string (consumer_key=ck_).

The WC API calls are rewritten by WordPress as:

^wc-api/v([1-3]{1})(.*)?    
index.php?wc-api-version=$matches[1]&wc-api-route=$matches[2]

And a call to the rewritten URL: https://www.custommadewraps.com/index.php?wc-api-version=2&wc-api-route=/orders?&consumer_secret=cs_&consumer_key=ck_

gives the expected response:

{"errors":[{"code":"woocommerce_api_authentication_error","message":"Consumer key 
is invalid."}]}

It detects the consumer_key and reports that it is valid.

I am out of ideas for debugging so that is why I reach out to you guys (and girls).

What I have noticed is that the content of the $_GET variable is different in both cases.

empty

array(0) {
}

vs:

array(4) {
  ["wc-api-version"]=>
  string(1) "2"
  ["wc-api-route"]=>
  string(8) "/orders?"
  ["consumer_secret"]=>
  string(3) "cs_"
  ["consumer_key"]=>
  string(3) "ck_"
}

All ideas are welcome.

Thanks in advance!

Pieter