modprobe tun failed with: modprobe

[terribleJim]

Trying to install on a Beelink mini computer with docker. Using example yaml fiiles. Been googling but can't seem to find a solution I can understand and is pertinent to my case. Seems a common problem otherwise. As I got in the error message this: "is CONFIG_TUN enabled in your kernel?", I did double check that and it is enabled in the kernel. I'm not using Proxmox. If I do "modprobe tun" it returns nothing.
OS is Ubuntu, latest. This is a new install, so far only home assistant, portainer, and mosquitto are installed as containers.

My yaml:

 tailscale-nginx:
    image: tailscale/tailscale:latest
    hostname: ha
    environment:
      - TS_AUTHKEY=tskey-auth-xxx-ephemeral=false
      - TS_EXTRA_ARGS=--advertise-tags=tag:container
      - TS_STATE_DIR=/var/lib/tailscale
      - TS_USERSPACE=false
      - TS_DEST_IP=192.168.50.163
    volumes:
      - ${PWD}/tailscale-nginx/state:/var/lib/tailscale
      - /dev/net/tun:/dev/net/tun
      #- /lib/modules:/lib/modules ##tried this but gave a different error
    cap_add:
      - net_admin
      - sys_module
    restart: unless-stopped
  nginx:
    image: nginx
    depends_on:
      - tailscale-nginx
    network_mode: service:tailscale-nginx
    privileged: true

[EDIT]
I added

devices:
      - /dev/net/tun:/dev/net/tun

and it installed a running container. Hopefully that does it. I would delete this if I could, but otherwise mark closed.