DNS service does not start

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3

Thank you very much for that hint! Loosely followed this guide to disabled the dns-proxy of connmand:
https://www.reddit.com/r/pihole/comments/por9uo/network_after_upgrade_to_bullseye/

changing connman start file /etc/systemd/system/multi-user.target.wants/connman.service

change from

ExecStart=/usr/sbin/connmand -n

to

ExecStart=/usr/sbin/connmand -n --nodnsproxy

reload config changes

systemctl daemon-reload

restart connman to free up port 53

systemctl restart connman.service

restart pihole-FTL

systemctl restart pihole-FTL.service

It is working again now!