Auto Select reports every subscription it could not complete in a red box at the top of the dashboard (each line links to the subscription):

• "Unable to select meals for subscription (Please verify customer allergens, dislikes or preferences)" – after removing allergens, dislikes, plan categories and diet preferences, no meal on the menu was left. Adjust the menu, the plan's categories or the customer's preferences, then run it again.
• "No meals added for subscription" – the subscription had no empty slots to fill (or the plan has zero delivery days).
• "#123 -> No Subscription Checkout" / "No Subscription Checkout Day" – the subscription is missing its original checkout or delivery-day record; open the subscription to check it.
• "<payment or cart error> - cart for subscription 123" – the meals were chosen but the order could not be saved (typically a payment problem).

The box disappears after you reload; the pending count on the Auto Select card tells you whether anything is still unresolved.