What is causing this Error?

This error can occur for several reasons:

The POS Terminal received the online order, but the ticket exceeded the order confirmation timeframe.
Location Network disruption/sync issues when the order has been sent.

How do I resolve this Error?

Ensure the location is configured to automatically complete paid fulfilled orders. For more information, visit the Enable Auto-Complete for 3rd Party Orders article.
If the issue persists, it is confirmed that the root cause of this issue occurring is network disruption/sync issues. Restart the network (ISP Modem & TP-Link router). Additionally, ensure POS Terminals Date & time and time zone settings are configured correctly. For more information, visit the Configure the Date & Time and Timezone for SkyTab POS Workstation Install article.
If the ticket was processed using Online Ordering or QR Pay integration, confirm the payment status in Lighthouse Business Manager (LBM) or Lighthouse Transaction Manager (LTM). If the transaction comes out as void, visit the Clone Transaction on LBM article or Duplicate or Reprocess Transactions in LTM article, depending on the platform used to reprocess the transaction.
If the ticket was processed using 3rd party integration (DoorDash, Uber Eats, etc.), contact their support to confirm the transaction status since it will be processed using a 3rd party gateway.

The expired order will disappear from the POS terminals after End of Day.