2251451 - Order Number is not getting generated for users via the Registration Connector

Order Number is not getting generated for users while registering them into classes using the Registration Connector. However, if the same user is registered into the same class with a price via the Learning Administration UI users are getting registered with a order number.

"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental." 

SAP SuccessFactors Learning

Learning, Registration Connector, Connector, Order Number, commerce, UI, manually, blank, class, Registration Financial Details, Orders , KBA , LOD-SF-LMS-CON , Connectors , LOD-SF-LMS-SCH , Class - Scheduled Offerings , Problem