I need to modify the content and layout of the PDF file that is generated via the "Export to PDF" button shown below.

The goal is that when users hit the "Export to PDF", the system uses my Modified Template instead of the default.

I have followed the advice laid out at https://d365goddess.com/dynamics-365-sales-generate-pdf-from-word-templates/
There are some differences, as shown below.

However, when I download the template, it is completely BLANK!!

What am I missing or doing wrong?