Somebody help! Connection never succeeded

Websocket
#1

I ran examples in the official Binance API python package. But the websocket examples failed to connect to the server. The error is like
"2022-04-28 05:09:02.115 UTC INFO binance.websocket.binance_client_factory: Start to connect…
2022-04-28 05:09:02.775 UTC WARNING binance.websocket.binance_client_protocol: WebSocket connection closed: connection was closed uncleanly (SSL error: unregistered scheme (in )), code: 1006, clean: False, reason: connection was closed uncleanly (SSL error: unregistered scheme (in ))
2022-04-28 05:09:02.776 UTC ERROR binance.websocket.binance_client_factory: Lost connection to Server. Reason: [Failure instance: Traceback (failure with no frames): <class ‘twisted.internet.error.ConnectionDone’>: Connection was closed cleanly.
]. Retrying: 3
2022-04-28 05:09:03.723 UTC DEBUG root: closing ws connection"

I also could not link to the server by a simple url like wss://stream.binance.com:9443/ws/bnbbtc@depth

What’s the problem here?

#2

It can be the networking issue from client side, try to connect to this url by websocat or other websocket client tool.

#3

I tried several online websocket test tool. I can reach other websocket servers but cannot connect to Binance’s. I use ExpressVPN for all networks. Does that matter?

#4

VPN can affect the connection, especially the websocket connection.

  1. testing with the same application from somewhere VPN is not required.
  2. Then try a different VPN from the same server

Then you should know where is the issue coming from.