Error notice in email Null

I’m trying this plugin with the free plugin on first hand. Will order the full when happy but there is a major issue I need help with.

I have this error/notice in the email that’s being sent to the customer and the admin:

Notice: Trying to access array offset on value of type null in /home/izzywie331/domains/izzyvoorjou.nl/public_html/wp-content/plugins/woo-delivery/public/class-coderockz-woo-delivery-public.php on line 1458

Onyone familiar with or idea how to solve?

Thanks!