Function id was called incorrectly. Order properties should not be accessed dire

Getting this error on woocommerce custom email:
Function id was called incorrectly. Order properties should not be accessed directly.

Full error Image:
https://prnt.sc/RmI2MiHWNPg7

I have been trying to add a custom template in customer-completed-order.php.
I have copied this file in my theme/woocommerce/email to avoid getting changed when woo-commerce is update.

i am trying to add the template in the file located in the same folder my-theme/woocommerce/email. using this way.

include(‘order-email-license-data.php’);

it works ok, but also displays error messages in the customer completed order notification email when debugging on enabled in wp-config.

Let me know how can I include this “order-email-license-data.php” without triggering any error.

Thanks