Hello,
Check if the following services are activated in SICF:
/default_host/sap/srmnxp
/default_host/sap/bc/bsp/srmnxp
/default_host/sap/public/bc/ui5_ui5
/default_host/sap/bc/ui5_ui5
/sap/public/opu
/sap/opu/odata
Also, see if Gateway is activated in SPRO -> ... -> Activate or Deactivate SAP Gateway.
Regards,
Ricardo