[lxc-users] Upgrade to Ubuntu Focal kills LXC critica functionality

[Saint Michael]

I have no idea what happens, but since I upgraded my Ubuntu to Focal,
lxc-start --version
4.0.2

Now my container gets a Acces Denied on a fifo object located in /tmp
I thought I gave the container all possible rights. What am I missing?

lxc.include = /usr/share/lxc/config/ubuntu.common.conf
lxc.mount.auto=
lxc.mount.auto=proc:rw sys:rw cgroup:rw
lxc.apparmor.profile=unconfined
lxc.tty.max = 10
lxc.pty.max = 1024
lxc.cgroup.devices.allow = c 1:3 rwm
lxc.cgroup.devices.allow = c 1:5 rwm
lxc.cgroup.devices.allow = c 5:1 rwm
lxc.cgroup.devices.allow = c 5:0 rwm
lxc.cgroup.devices.allow = c 4:0 rwm
lxc.cgroup.devices.allow = c 4:1 rwm
lxc.cgroup.devices.allow = c 1:9 rwm
lxc.cgroup.devices.allow = c 1:8 rwm
lxc.cgroup.devices.allow = c 136:* rwm
lxc.cgroup.devices.allow = c 5:2 rwm
lxc.cgroup.devices.allow = c 254:0 rwm
lxc.cgroup.devices.allow = c 10:137 rwm # loop-control
lxc.cgroup.devices.allow = b 7:* rwm    # loop*
lxc.cgroup.devices.allow = c 10:229 rwm #fuse
lxc.cgroup.devices.allow = c 10:200 rwm #docker
lxc.cgroup.devices.allow= a
lxc.cap.drop=
lxc.cgroup.devices.deny=
lxc.autodev= 1
lxc.hook.autodev = sh -c 'mknod ${LXC_ROOTFS_MOUNT}/dev/fuse c 10 229'
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