Troubleshooting WooCommerce

If you have recently updated your WooCommerce plugin, or your WordPress install and you are experiencing issues with the ecommerce features of your website, your first step is to check the WC System Status page to identify if any problems exist:

You can find the System Status page in your site's backend menu at WooCommerce->System Status.  The most obvious problems will show in red, but visit the WooCommerce docs homepage to check your version for WordPress compatibility and any other issues that may be documented there.