FTL Capability error

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4

Probably aufs and the need to get docker to use device-mapper.

But first off how did you install docker as the standard debian repo isn’t very current.

Follow https://docs.docker.com/engine/installation/linux/debian/

uninstall docker

Use the docker repos’s

Install docker

Then from the docker documentation get docker.d to use device-mapper rather than aufs.

mkdir /etc/systemd/system/docker.service.d
nano /etc/systemd/system/docker.service.d/execWithDeviceMapper.conf

Create like so (paste):
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd --storage-driver=devicemapper -H fd://

Check the last line is correct by grep ExecStart /lib/systemd/system/docker.service
Just to check it is -H fd://

See how you go.