Messages

Can you share your config?

# pluginctl -g dnsmasq

and the error?

# opnsense-log | grep returned.exit.code


Cheers,
Franco

Got it resolved.
The domains tab had one entry where instead of IP address, exclamation character was listed. Replaced it with IP address and Dnsmasq now starts properly.

Same issue here, after applying 25.1.2 Dnsmasq will not start.
Dnsmasq Log shows:
FAILED to start up
dnsmasq   bad command line options: Name does not resolve

running #/usr/local/opnsense/mvc/script/run_migrations.php didn't produce any output.