Sep 16 16:06:49 howard-vm systemd[1]: Started Service for snap application docker.dockerd.
Sep 16 16:06:49 howard-vm kernel: aufs aufs_fill_super:918:mount[15942]: no arg
Sep 16 16:06:49 howard-vm kernel: overlayfs: missing 'lowerdir'
Sep 16 16:06:49 howard-vm docker.dockerd[15915]: time="2020-09-16T16:06:49.738317626+02:00" level=error msg="failed to mount overlay: invalid argument" storage-driver=overlay2
Sep 16 16:06:49 howard-vm kernel: overlayfs: filesystem on '/var/snap/docker/common/var-lib-docker/check-overlayfs-support487212484/upper' not supported as upperdir
Sep 16 16:06:50 howard-vm docker.dockerd[15915]: failed to start daemon: error initializing graphdriver: driver not supported
Sep 16 16:06:50 howard-vm systemd[1]: snap.docker.dockerd.service: Main process exited, code=exited, status=1/FAILURE
Sep 16 16:06:50 howard-vm systemd[1]: snap.docker.dockerd.service: Failed with result 'exit-code'.
Sep 16 16:06:50 howard-vm systemd[1]: snap.docker.dockerd.service: Scheduled restart job, restart counter is at 5.
Sep 16 16:06:50 howard-vm systemd[1]: Stopped Service for snap application docker.dockerd.
Sep 16 16:06:50 howard-vm systemd[1]: snap.docker.dockerd.service: Start request repeated too quickly.
Sep 16 16:06:50 howard-vm systemd[1]: snap.docker.dockerd.service: Failed with result 'exit-code'.
Sep 16 16:06:50 howard-vm systemd[1]: Failed to start Service for snap application docker.dockerd.