GRPC discovery bug

When trying to work with grpc I have this bug with infinite loading on inspecting schema:

I launched it from terminal and I see this error:

thread 'tokio-runtime-worker' (34807) panicked at yaak-grpc/src/reflection.rs:260:57: 
add file descriptor proto: integration.proto: name 'google.protobuf.Struct' is not defined note: 
run with RUST_BACKTRACE=1 environment variable to display a backtrace

My proto file:

syntax = "proto3";

import "google/protobuf/empty.proto";
import "google/protobuf/struct.proto";

package integration;
....
message Response {
  string id = 1;
  google.protobuf.Struct data = 2;
  string status = 3;
}

Same bug on Mac