This happens when one bucket is sold out but the other bucket is not. "'Unnamed Pass' cannot be used: No more tickets are available for this type of pass."

It would just be great if this was editable in the configurator. This is similar to this feature request, but not specifically about virtual: https://admin.eventive.org/feedback/p/editable-text-for-when-a-certain-ticket-bucket-does-not-have-tickets-available