{
  "code": "UnsupportedRPCMethod",
  "type": "ISP",
  "message": "The request has failed due to internal RPC method not found",
  "request_id": "0b86d523d716242163194473541655"
}

This shows a temporary server issue in Lazada platform. 

The IT team has built in a retry mechanism on the 16 July 2021. OneCart will retry gracefully every few minutes until successful if it sees this error message.