Install Portainer on Armbian (RK322)

Hello,
I have an issue during the installation of Portainer using these commands:
-docker volume create portainer_data
-docker run -d -p 8000:8000 -p 9443:9443 --name portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce:latest
(Install Portainer CE with Docker on Linux - Portainer Documentation)

I get the following error:

docker: Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: cgroup namespaces aren't enabled in the kernel: unknown.

How can I resolve this?
Thanks in advance.