Fix error in PHP script

I have a PHP script that imports/updates products in Woocommerce via the v1 REST API. The data source is a XML file. Since our last Wordpress/Woo upgrade it stopped working.
It uses a version of WooCommerce API - PHP Client - https://github.com/woocommerce/wc-api-php.
Need someone to test the script and make the required changes, for the import process to work again. Reading the XML and GET calls to the API work fine. Throws a error when it tries to use PUT.

Currently it stops with error, when it tries to update, as you can see at the bottom of the output
Fatal error: Uncaught Automattic\WooCommerce\HttpClient\HttpClientException: Error: No route was found matching the URL and request method. [rest_no_route] in /home/externaluser/sparImport/import/HttpClient/HttpClient.http://php:348 Stack trace: #0

This is not a Wordpress click job, it needs PHP debug skills and knowledge of Wordpress API.

Only real bids with timeline. Ask if you need clarification.