@Paul-Cousins Same exact thing happened. Can’t believe how accurate you stated.
What worked for me was to make backup copies, then copied the original config files from /rom/ to /etc/
cp -rf /rom/etc/config/ /etc/config/
cp -rf /rom/etc/dnsmasq.conf /etc/
cp -rf /rom/etc/rc.local /etc/
This sets back working system.