Fix my WP, Woo-commerce errors caused by product import using xpath

Since updating to WP 5.8.1 and associated woo-commerce and updating to PHP 7.4 a perfectly workin pluging (Dropshipping Inventory Synchronization for WooCommerce) was working perfectly. I am now plagued with php erros and the pluging does not import any more and I get "[04-Oct-2021 13:05:38 UTC] PHP Warning: DOMDocument::loadXML(http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd): failed to open stream: HTTP request failed! in phar:///home2/volton/public_html/wp-content/plugins/wc-inventory-synchronization/includes.phar/InventorySynchronization/Adapter/Html/Parser.php on line 2"
Errors.

I need assistance to fix these issues.

I can give anydesk login to demonstrate the issue.