Unable to get the live feed using websocket for symboInfo

import threading
from fyers_apiv3 import fyersModel
from fyers_apiv3.FyersWebsocket import data_ws

class FyersLiveStream:
    def __init__(self, symbols, access_token):
        print(f"stream {symbols}, accesstoken {access_token}")
        self.symbols = symbols
        self.access_token = access_token
        self.fyers = None

    def onmessage(self, message):
        """
        Callback function to handle incoming messages from the FyersDataSocket WebSocket.
        Parameters:
            message (dict): The received message from the WebSocket.
        """
        print("======= Response:", message)

    def onerror(self, message):
        """
        Callback function to handle WebSocket errors.
        Parameters:
            message (dict): The error message received from the WebSocket.
        """
        print("===== Error:", message)

    def onclose(self, message):
        """
        Callback function to handle WebSocket connection close events.
        """
        print("======= Connection closed:", message)

    def onopen(self):
        """
        Callback function to subscribe to data type and symbols upon WebSocket connection.
        """
        print("===== On open connection")
        print(f"Requesting streaming of symbols {self.symbols}")
        # Specify the data type and symbols you want to subscribe to
        data_type = "SymbolUpdate"

        # Subscribe to the specified symbols and data type
        symbols = ["NSE:NIFTY50-INDEX", "NSE:NIFTYBANK-INDEX"]
        self.fyers.subscribe(symbols=symbols, data_type=data_type)

        # Keep the socket running to receive real-time data
        self.fyers.keep_running()

    def start_stream(self):
        """
        Function to start the Fyers WebSocket stream.
        """
        # Create a FyersDataSocket instance with the provided parameters
        self.fyers = data_ws.FyersDataSocket(
            access_token=self.access_token,
            log_path="",
            litemode=False,
            write_to_file=False,
            reconnect=True,
            on_connect=self.onopen,
            on_close=self.onclose,
            on_error=self.onerror,
            on_message=self.onmessage
        )

        # Establish a connection to the Fyers WebSocket
        self.fyers.connect()