SAP Fiori : Create Sales Orders ERROR

Hi ,

we are running SAP Fiori Implementation , we already installed central hub deployment.

• Frond-end Server : SAP NW 7.4 SR1 with Fiori Add-on installation based on Fiori Schenario
  • UIX01EAP 100 SP4
• Backend Server : SAP ECC EHP4 with Fiori Add-on
  • SRA017 600 SP5

when we were activating Create Sales Order based on App Implementation: Create Sales Orders - SAP Fiori Apps for Lower Back-End Releases - SAP Library

we got problem when launched Fiori :

we checked Gateway Client

now, we checked switched to Backend server and check that class

any advise ??

thanks

GHochi