3671286 - purchase orders cannot be opened in manage purchase orders app in fiori ui

• Purchase orders cannot be opened in Manage purchase orders app.
• Error message displayed: "Invalid or no mapping to system data types found."

• SAP Fiori
• SAP S/4Hana

purchase orders, manage purchase orders app, fiori ui, invalid mapping, no mapping, system data types, error message, odata service, MM_PUR_PO_MAINT_V2_SRV, cache clearance, sap notes, performance optimization, purchase order processing , KBA , MM-FIO-PUR-PO , Fiori UI for Purchase Orders , Problem