I’m encountering an issue with the WooCommerce PDF Invoice plugin. I’ve configured it to generate an invoice upon order completion. On the thank you page, I want customers to see two buttons: one to download the invoice and another to email it to them. While the download link works perfectly, the emailed attachment lacks an extension. Attempting to open it in Adobe Acrobat results in an error message stating it’s either unsupported or damaged. Even after manually adding the “.pdf” extension, the file remains unreadable.