User's Bio in pdf invoice

Hi there,
I’m trying to add the user’s bio in the PDF invoice.
I added that in the checkout page with the following code:
<p>Bio: <?php echo get_the_author_meta(‘description’); ?></p>
and it’s working, but not when I use it in the template’s body.php file.

How can I solve this problem?
Thanks and best regards

https://wordpress.org/plugins/woocommerce-pdf-invoices/