Your Xstore Child theme contains outdated copies of some WooCommerce template files. These files may need to be updated to ensure compatibility with the current version of WooCommerce. You can check which files have been affected on the system status page. If in doubt, check with the author of the topic.
How to proceed once my Xstore theme is in version 4.17 ???
You need to downgrade woocommerce to 3.2.6 version, because 3.3 does not exist anymore on the official woocommerce site. Once new woocommerce version will be available, we will update our theme within 24 hours.
Also, before update any plugin you need to be sure that theme and other plugins that you use are compatible with the new version.