Checkout ProblemsWhat to do when a payment method isn't available, the store doesn't answer, a payment or order is refused, or a gateway's payment page looks wrong.
Totals Don't MatchWhat it means when the POS says your store changed an order's totals, how to bring the POS back in line with your store, and what to send support.
Critical ErrorWhat WordPress's critical error means at the till, where the POS shows it, and how to find the PHP error behind it.
Response ErrorWhat to do when your store answers the POS with an empty reply, an error page or stray text instead of data, including the old "Cannot read properties of undefined (reading 'data')" message.
Plugin ConflictsFind the WordPress plugin that is breaking the POS, and fix the plugins known to clash with WCPOS.
CloudflareStop Cloudflare's security checks from blocking the WCPOS app's connection to your store.
Product SyncHow products reach each till: the boot screen, the first download on a new device, keeping up with changes in your store, and refreshing the product list.