Class WebsocketConnection's _create_connection function got err alttester.exceptions.ConnectionError: the JSON object must be str, bytes or bytearray, not NoneType

[phucvo-skymavis]

Python 3
Unity 2022.3.39
AltTester® Unity SDK a 2.1.2
Android
macOS

Summary

Class WebsocketConnection's _create_connection fuction got err alttester.exceptions.ConnectionError: the JSON object must be str, bytes or bytearray, not NoneType

Steps to reproduce

When AltDriver connect to AltServer, WebsocketConnection called connect(). But when it call _create_connection with message like this
++Rcv decoded: fin=1 opcode=1 data=b'{"messageId":null,"driverId":null,"commandName":"driverRegistered","isNotification":true}'
The msg that _on_message received is '{"messageId":null,"driverId":null,"commandName":"driverRegistered","isNotification":true}'
After that, it parsed msg to json by response = json.loads(message). And in self._notification_handler.handle_notification(response), it continue parsed msg to json again by
data = json.loads(message.get("data")). There's no data key on this json, so it cause ConnectionError when I call cls.alt_driver = AltDriver() with my Unity Android app