I did all this yesterday and today there was another outage (can no longer access the GUi) I had to restart the box with a cold start. In the static IP settings suddenly 2 devices appear that do not belong there but are not active and have no assigned IP. I changed the active DHCP range so that hopefully these suspicious devices are no longer on it next time. But I don’t really believe it. It is more likely that there is still corrupt data in the configuration memory that suddenly appears.
I’ll probably have to call …. again tomorrow because nobody is calling back.