These files may need updating to ensure they are compatible with the current version of WooCommerce. Suggestions to fix this:
Update your theme to the latest version. If no update is available contact your theme author asking about compatibility with the current WooCommerce version.
If you copied over a template file to change something, then you will need to copy the new version of the template and apply your changes again.
HighendWP/woocommerce/cart/cart-empty.php version 3.5.0 is out of date. The core version is 7.0.1,
HighendWP/woocommerce/cart/cart.php version 4.4.0 is out of date. The core version is 7.0.1,
HighendWP/woocommerce/cart/shipping-calculator.php version 4.0.0 is out of date. The core version is 7.0.1,