Fiori Apps - Create Sales Order Error

Hi Experts,

Notes: EHP7 SP18 / Oracle 12c / WinServer / up to date newly Installed Fiori app/Gateways/etc components.

Track sales order & price availability were working properly.

Upon placing order in Fiori - Create Sales Order App, we have encountered the error ..

Call of service/sap/opu/odata/sap/SRA017_SALESORDER_CREATE_SRV/SalesOrdersterminated because of an error.

This error message in fiori pointed us to check the error in backend through ST22 which I got 2 abap dump every time we clicked the place order button in fiori.

As per checking, CALL_FUNCTION_REMOTE_ERROR dump was caused by DYNPRO_SEND_IN_BACKGROUND dump then I tried to trace this dump first but as I search there so many error related to this dump and can't find the one related to create sales order.

dynpro-dump.txt <DYNPRO_SEND_IN_BACKGROUND>

Please guide me regarding this concern.