Added wrong WiFi password. Now I can't correct it

My Supervisor was working fine until I decided to add the Wifi password so I could have a second access in case I had to cut cords.
But I was fooled by the UI and added my wifi without a password. No I get the error below and I’m not able to change the password again. Do you have any tip on how to solve it?

20-12-07 21:14:36 ERROR (MainThread) [aiohttp.server] Error handling request
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/aiohttp/", line 422, in _handle_request
    resp = await self._request_handler(request)
  File "/usr/local/lib/python3.8/site-packages/sentry_sdk/integrations/", line 123, in sentry_app_handle
  File "/usr/local/lib/python3.8/site-packages/sentry_sdk/", line 54, in reraise
    raise value
  File "/usr/local/lib/python3.8/site-packages/sentry_sdk/integrations/", line 113, in sentry_app_handle
    response = await old_handle(self, request)
  File "/usr/local/lib/python3.8/site-packages/aiohttp/", line 499, in _handle
    resp = await handler(request)
  File "/usr/local/lib/python3.8/site-packages/aiohttp/", line 118, in impl
    return await handler(request)
  File "/usr/src/supervisor/supervisor/api/", line 133, in system_validation
    return await handler(request)
  File "/usr/src/supervisor/supervisor/api/", line 195, in token_validation
    return await handler(request)
  File "/usr/src/supervisor/supervisor/api/", line 60, in wrap_api
    answer = await method(api, *args, **kwargs)
  File "/usr/src/supervisor/supervisor/api/", line 166, in info
    for interface in
  File "/usr/src/supervisor/supervisor/host/", line 54, in interfaces
  File "/usr/src/supervisor/supervisor/host/", line 296, in from_dbus_interface
  File "/usr/src/supervisor/supervisor/host/", line 341, in _map_nm_wifi
    if inet.settings.wireless_security.key_mgmt == "none":
AttributeError: 'NoneType' object has no attribute 'key_mgmt'
  • Format a USB-Stick to FAT32 with volume-name CONFIG .
  • Create a folder named network in the root of the newly formatted USB-stick.
  • Within that folder create a file named my-network without extension.
  • Copy one of the examples to the my-network file and adjust accordingly.
  • Plug the USB-stick into the Raspberry Pi.
    Go to supervisor system and click Import from USB button