webSocket connection to 'ws://localhost:8081/my-websocket' failed:

There could be multiple reasons for the webSocket connection failure. Here are some possible causes:
- The server is not running or is not listening on the specified port (8081 in this case).
- The URL is incorrect or malformed.
- The connection is blocked by a firewall or network restriction.
- The client or server code has a bug that prevents the connection from establishing.

To troubleshoot the issue, you can try the following steps:
- Check if the server is running and listening on the correct port.
- Verify the URL syntax and make sure it matches the server configuration.
- Check if there are any firewall rules or network restrictions that block the connection.
- Debug the client or server code to identify any bugs or errors that prevent the connection.