Problems with SAMBA Share Addon - Cannot change configuration

I cannot configure the SAMBA addon. After installing the addon, I make any change but get the response:

Failed to save add-on configuration, Unknown error, see supervisor logs

In the Homeassistant Core log I have:

Logger: homeassistant.components.hassio
Source: components/hassio/websocket_api.py:123
Integration: Home Assistant Supervisor (documentation, issues)
First occurred: 16:08:58 (5 occurrences)
Last logged: 16:52:59

Failed to to call /addons/core_samba/options/validate -
Failed to to call /core/info - System is not ready with state: setup
Failed to to call /supervisor/info - System is not ready with state: setup

and

Logger: homeassistant.components.hassio.handler
Source: components/hassio/handler.py:263
Integration: Home Assistant Supervisor (documentation, issues)
First occurred: 16:08:58 (3 occurrences)
Last logged: 16:52:59

Timeout on /addons/core_samba/options/validate request

Any suggestions as to what I might do. Otherwise the system seems to be working well!

Regards,
Paul McGinnie

Further to this - bought a new Memory card (running on a Pi3) and recovered the system with that backup at startup - however, have the same problem - cannot make changes to the configuration of the SAMBA addon. So not a card degradation problem. Any other suggestions?

Regards,
Paul

This error was caused by the checking logic of the config page - it checks that the password is not in the pwned database. I block lots of outbound traffic - including this!

Opening appropriate holes in the firewall fixes it!