Ubuntu chromium and web ide

After activating bluetooth in chrome with enabling this switch :
chrome://flags/#enable-experimental-web-­platform-features
i face a new issue :

serviceworker> active
Handling URL "https://www.espruino.com/ide/"
Couldn't connect to wss://localhost:31234 - disabling websockets for this session
ERROR: serial_frame: getPorts timeout, disabling
ERROR: getURL("/serial/ports") error : Not Found
/serial/ports doesn't exist - disabling WebSocket support
>>> Connecting...
Set Slow Write = true
BT> ERROR: NotFoundError: Bluetooth adapter not available.
ERROR: [notify_error] Connection Failed.
>>> Connection Failed.