Before the WordPress 5.0 release tomorrow and your update… if you’re using WooCommerce on your site be sure to update the WooCommerce plugin to the most recent version.
The WordPress 5.0 update is a major release that includes the new WordPress editor, Gutenberg.
Gutenberg changes the way we’ll do many things in WordPress starting with editing Posts and Pages. To learn more about Gutenberg visit https://wordpress.org/gutenberg.
There’s a Classic Editor plugin you can install to revert to the editor we’ve come to know and love until you’re ready to make the jump to Gutenberg.
Back to WooCommerce… not updating your WooCommerce plugin before updating WordPress will break your e-commerce as the WooCommerce folks have shared.