URL Error on Downloadable Files

• The problem concerns the WooCommerce e-commerce module and more particularly the creation of simple, virtual and downloadable products.
• For a few days (it worked well before), the download url of the downloadable file is automatically transformed by woo commerce, wrongly and leading to a 404 error for the customer trying to download the link.
• Example of the declared url: https://www.orama-patrimoine.fr/wp-content/uploads/2021/09/livre-blanc-orama-patrimoine.pdf
• Example of the url transformed by woocommerce upon registration: /home/oramapp/www/wp-content/uploads/2021/09/livre-blanc-orama-patrimoine.pdf
• NB: no new plugins installed between the before and after bug.

Any ideas ? A big thank you in advance