3428135 - Error: Order type "X" is not defined in your system

When importing Sales Orders (which are not of type C) using the Import Sales Order app (F4293) the error message "Order type "X*" is not defined in your system" is raised.

*Where X represents the Order type ID. 

SAP S/4HANA Cloud

The app supports a limited number of sales order types.

Order types must belong to document category C (Order).

Import Sales Orders

import sales order, s/4hana cloud, sales order, C, CR, Order type, document category,  is not defined in your system, F4293  , KBA , SD-SLS-IMP-SPR-2CL , Sales Document Import from Spreadsheet (Public Cloud) , Problem