What is ‘NetSuite Under Maintenance Error’ for order rejection by NetSuite for the Robust NetSuite Connector App for BigCommerece?

What is ‘NetSuite Under Maintenance Error’ for order rejection by NetSuite for the Robust NetSuite Connector App for BigCommerece?

In case when the NetSuite server undergoes a server maintenance procedure than on the order status is shows as ‘Rejected_By_NetSuite’ on the order log page of the app. A notifying Pop-up therefore emerges in on clicking the ‘Rejected_By_NetSuite’ button messaging ‘NetSuite Under Maintenance’. However the pending order due to “NetSuite Under Maintenance” gets automatically resubmitted after 30-40 minutes.