I am getting an error when I execute the [example](https://github.com/bandprotocol/pyband/blob/master/example.py) provided in README: >TypeError: Parameter to MergeFrom() must be instance of same class: expected cosmos.base.v1beta1.coin_pb2.Coin got cosmos.base.v1beta1.coin_pb2.Coin. Dependencies: |name|version| |:---:|:---:| |python|3.8.9| |pyband|0.2.8| |protobuf|4.21.5| I experimented with `protobuf==3.20.1` and also with `protobuf==4.21.5`. What am I doing wrong?