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Unable to start dockerd on Ubuntu 18.04.4 LTS

I’m running Docker version 20.10.9, build 79ea9d3 from Docker repo, inside Docker (WSL) and I’m unable to start dockerd daemon. I got the following errors when launched from command line (as root)

ERRO[2021-10-11T06:53:02.865759663Z] failed to mount overlay: operation not permitted storage-driver=overlay2
ERRO[2021-10-11T06:53:02.865835969Z] exec: “fuse-overlayfs”: executable file not found in $PATH storage-driver=fuse-overlayfs
ERRO[2021-10-11T06:53:02.865938274Z] AUFS was not found in /proc/filesystems storage-driver=aufs
ERRO[2021-10-11T06:53:02.866535093Z] failed to mount overlay: operation not permitted storage-driver=overlay
WARN[2021-10-11T06:53:02.866907298Z] Unable to setup quota: operation not permitted
WARN[2021-10-11T06:53:02.888580701Z] Your kernel does not support cgroup blkio weight
WARN[2021-10-11T06:53:02.888616103Z] Your kernel does not support cgroup blkio weight_device
WARN[2021-10-11T06:53:02.888620036Z] Your kernel does not support cgroup blkio throttle.read_bps_device
WARN[2021-10-11T06:53:02.888622476Z] Your kernel does not support cgroup blkio throttle.write_bps_device
WARN[2021-10-11T06:53:02.888637393Z] Your kernel does not support cgroup blkio throttle.read_iops_device
WARN[2021-10-11T06:53:02.888640981Z] Your kernel does not support cgroup blkio throttle.write_iops_device
INFO[2021-10-11T06:53:02.888805587Z] Loading containers: start.
WARN[2021-10-11T06:53:02.890174917Z] Running iptables --wait -t nat -L -n failed with message: iptables v1.6.1: can't initialize iptables table nat’: Permission denied (you must be root)
Perhaps iptables or your kernel needs to be upgraded., error: exit status 3 INFO[2021-10-11T06:53:02.904314243Z] stopping event stream following graceful shutdown error="<nil>" module=libcontainerd namespace=moby INFO[2021-10-11T06:53:02.904602848Z] stopping event stream following graceful shutdown error="context canceled" module=libcontainerd namespace=plugins.moby INFO[2021-10-11T06:53:02.904631476Z] stopping healthcheck following graceful shutdown module=libcontainerd WARN[2021-10-11T06:53:03.905958287Z] grpc: addrConn.createTransport failed to connect to {unix:///var/run/docker/containerd/containerd.sock <nil> 0 <nil>}. Err :connection error: desc = "transport: Error while dialing dial unix:///var/run/docker/containerd/containerd.sock: timeout". Reconnecting... module=grpc failed to start daemon: Error initializing network controller: error obtaining controller instance: failed to create NAT chain DOCKER: iptables failed: iptables -t nat -N DOCKER: iptables v1.6.1: can't initialize iptables table nat’: Permission denied (you must be root)
Perhaps iptables or your kernel needs to be upgraded.
(exit status 3)