"ImportAutoInvoice" Interface Errors Based on Sales Orders

When running "Import AutoInvoice" from a sales order, the following errors occurred in the report:

・The item validation organization for the business unit is not set up.
・The entered unit of measure and the primary unit of measure of the system item must share the same unit of measure class.

Regarding the unit of measure error, the primary unit of measure is registered as "PC" in the item master, and the order was also registered with "PC," yet this error still occurred. Please advise on how to resolve this.