fix error

ekms/internal/kms/kmsetsi.go

@@ -142,7 +142,7 @@ func (es *etsiServer) ETSIAssignForwarding(ctx context.Context, in *pb.ETSIAssig
 func (es *etsiServer) ETSISendPayload(ctx context.Context, in *pb.ETSISendPayloadRequest) (*pb.ETSISendPayloadResponse, error) {
 	pathId, err := uuid.Parse(in.GetPathId())
 	if err != nil {
-		return nil, status.Errorf(codes.InvalidArgument, "The given path id %s is no uuid; err = ", in.GetPathId(), err)
+		return nil, status.Errorf(codes.InvalidArgument, "The given path id %s is no uuid; err = %s ", in.GetPathId(), err)
 	}
 
 	route, ok := es.handlingEkms.routingTable[pathId]
@@ -166,7 +166,7 @@ func (es *etsiServer) ETSISendPayload(ctx context.Context, in *pb.ETSISendPayloa
 	//}
 
 	if err := route.Next.SendPayload([]byte(in.GetPayload()), pathId); err != nil {
-		return nil, status.Errorf(codes.Internal, "Failed to send payload: ", err)
+		return nil, status.Errorf(codes.Internal, "Failed to send payload: %s", err)
 	}
 
 	return &pb.ETSISendPayloadResponse{