Failed to create lock for buildserver

I am trying to create unprivileged container under user “buildserver”.
I moved directory of privileged container and trying to see is it visible or not:

buildserver@localhost ~ $ lxc-ls
Failed to create lock for buildserver

directory structure looks like this:
buildserver@localhost ~ $ find . -maxdepth 6
.
./.local
./.local/share
./.local/share/lxc
./.local/share/lxc/buildserver
./.local/share/lxc/buildserver/config
./.local/share/lxc/buildserver/rootfs
./.local/share/lxc/buildserver/rootfs/boot
./.local/share/lxc/buildserver/rootfs/run
./.local/share/lxc/buildserver/rootfs/media
./.local/share/lxc/buildserver/rootfs/etc
./.local/share/lxc/buildserver/rootfs/usr
./.local/share/lxc/buildserver/rootfs/lib
./.local/share/lxc/buildserver/rootfs/proc
./.local/share/lxc/buildserver/rootfs/mnt
./.local/share/lxc/buildserver/rootfs/lib64
./.local/share/lxc/buildserver/rootfs/sbin
./.local/share/lxc/buildserver/rootfs/var
./.local/share/lxc/buildserver/rootfs/home
./.local/share/lxc/buildserver/rootfs/opt
./.local/share/lxc/buildserver/rootfs/tmp
./.local/share/lxc/buildserver/rootfs/bin
./.local/share/lxc/buildserver/rootfs/root
./.local/share/lxc/buildserver/rootfs/dev
./.local/share/lxc/buildserver/rootfs/sys
./.local/share/lxc/buildserver/rootfs/lost+found
./.local/share/lxcsnaps
./.bash_profile
./.bash_logout
./.cache
./.cache/lxc
./.bashrc
./.bash_history
./.ssh
./.config
./.config/lxc
./.config/lxc/default.conf

owner is
sudo chown -R buildserver:buildserver /home/buildserver

looks similar to this topic - Failed to start LXC on Linux Kernel 2.6.32-220
mine kernel version is
$ uname -a
Linux localhost 5.4.28-gentoo-x86_64 #6 SMP Mon Apr 13 18:50:15 MSK 2020 x86_64 Intel® Core™2 Quad CPU Q9450 @ 2.66GHz GenuineIntel GNU/Linux

lxc was installed into system root (/), as an usual package.
buildserver@localhost ~ $ emerge -pv lxc

These are the packages that would be merged, in order:

Calculating dependencies… done!
[ebuild R ~] app-emulation/lxc-4.0.0_p9::einflay USE=“pam seccomp templates -apparmor -examples (-selinux)” 0 KiB

Total: 1 package (1 reinstall), Size of downloads: 0 KiB