After activating the plugins, when you are going to activate the license on the plugin settings page, sometimes you will see an error like “There has been a critical error on this website. Please check your site admin email inbox for instructions. If you continue to have problems, please try the support forums.”

To solve the issue, please go to the WooCommerce > Settings > Advanced > Woo Delivery and check the “I have a large amount of products” and Save Changes

For better understanding, please follow the screenshot