Docker issues for running ntopng

Hello,

Using an rpi4 with recent snapshot. I am trying to install a docker container with some debian in order to be able to run ntopng (because there are no opkg's of it, even if some raspbian package exists for arm64.
So I installed docker and some other packages:

docker - 20.10.6-1
docker-compose - 1.29.2-1
luci-app-dockerman - v0.5.13
luci-lib-docker - git-20.211.27004-141857a
python3-docker - 5.0.0-1
python3-dockerpty - 0.4.1-3

I do see a new item on luci, Docker > Configuration, but when I open it, the page is empty, only the title "DockerMan is a simple docker manager client for LuCI" and the save buttons.
Can someone give me some tip ? The idea is to install ntopng for arm64 on a container !

Thank you !

Followup: I could install latest ipk. Now dockerd fails to start, with this error:

INFO[2021-06-15T11:52:47.675609670Z] loading plugin "io.containerd.grpc.v1.version"...  type=io.containerd.grpc.v1
INFO[2021-06-15T11:52:47.675649393Z] loading plugin "io.containerd.grpc.v1.introspection"...  type=io.containerd.grpc.v1
INFO[2021-06-15T11:52:47.676526670Z] serving...                                    address=/var/run/docker/containerd/containerd-debug.sock
INFO[2021-06-15T11:52:47.676715967Z] serving...                                    address=/var/run/docker/containerd/containerd.sock.ttrpc
INFO[2021-06-15T11:52:47.676855985Z] serving...                                    address=/var/run/docker/containerd/containerd.sock
INFO[2021-06-15T11:52:47.676918059Z] containerd successfully booted in 0.102068s  
INFO[2021-06-15T11:52:47.695683096Z] parsed scheme: "unix"                         module=grpc
INFO[2021-06-15T11:52:47.695980300Z] scheme "unix" not registered, fallback to default scheme  module=grpc
INFO[2021-06-15T11:52:47.696159115Z] ccResolverWrapper: sending update to cc: {[{unix:///var/run/docker/containerd/containerd.sock  <nil> 0 <nil>}] <nil> <nil>}  module=grpc
INFO[2021-06-15T11:52:47.696295744Z] ClientConn switching balancer to "pick_first"  module=grpc
INFO[2021-06-15T11:52:47.698424726Z] parsed scheme: "unix"                         module=grpc
INFO[2021-06-15T11:52:47.698492152Z] scheme "unix" not registered, fallback to default scheme  module=grpc
INFO[2021-06-15T11:52:47.698547022Z] ccResolverWrapper: sending update to cc: {[{unix:///var/run/docker/containerd/containerd.sock  <nil> 0 <nil>}] <nil> <nil>}  module=grpc
INFO[2021-06-15T11:52:47.698607559Z] ClientConn switching balancer to "pick_first"  module=grpc
WARN[2021-06-15T11:52:47.705354393Z] Your kernel does not support cgroup memory limit 
WARN[2021-06-15T11:52:47.705571059Z] Your kernel does not support cgroup blkio weight 
WARN[2021-06-15T11:52:47.705654633Z] Your kernel does not support cgroup blkio weight_device 
INFO[2021-06-15T11:52:47.706430059Z] stopping event stream following graceful shutdown  error="context canceled" module=libcontainerd namespace=plugins.moby
INFO[2021-06-15T11:52:47.706666504Z] stopping healthcheck following graceful shutdown  module=libcontainerd
failed to start daemon: Devices cgroup isn't mounted
root@rpi4:~#

please refrain from creating duplicate topics...

it will not increase chance of response...