Session 5 Error

hi,

While running the session 5 code in cmd I am getting below error. Please advise.

C:\Users\LENOVO\Desktop\Dhan Coding\5. Session5- Python Part 2\Ltp Based Strike Selection>PY Dhan_websocket.py
Reading existing file all_instrument 2025-12-25.csv
Watchlist changed. Reconnecting the feed…
Disconnected from WebSocket feed.
WebSocket connection error: connection closed while reading HTTP status line
Reconnecting Again…
Watchlist changed. Reconnecting the feed…
Disconnected from WebSocket feed.