Aggregator not reponding to collaborator: Status UNAVAILABLE

[vinaBira]

I tried Aggregator and collaborator model from https://openfl.readthedocs.io/en/latest/running_the_federation.html#aggregator-based-workflow as it is on one GPU machine as aggrgator and Edge devices Jetson nanos as collaborator.
All of the devices have as per requirements like python3 version mentioned in the openfl documentation.

I started with basic torch_cnn_model
But,
My collaborator got stuck with :StatusCode.UNAVAILABLE
Attempting to connect to aggregator at [host name]:[port]
Task is not assigned from server node.

Does implementation supported for Jetson nanos?
I tried opening ports with UFW and proxy sever setup as well from similar few discussion pointing the same error.
New firewall rule made still not working,
Could you please guide me in correct direction to complete the setup?