hello. I also had the same problem in Ubuntu.
dnsmasq-base was recently upgraded, and I’m not sure why, but compatibility seems to have been broken.
This could be resolved by downgrading dnsmasq-base to version 2.86-1.1 and then reactivating the network.
If you are Ubuntu, downgrade using the command below.
sudo apt install dnsmasq-base=2.86-1.1