[ad_1]
Hi @jacobo_zeromm,
This often happens when you migrate your site, or when you or a cleanup process accidentally delete the plugin temp folder, located under wp-content/uploads, maybe one of these things happened recently?
To solve this, please go to WooCommerce > PDF Invoices > Status tab, and click on the Reinstall fonts button. Then, try to open an invoice and check if it looks good.