"WireGuard LXC" installation fails

[masterlog80]

Hello,
I am trying to install WireGuard LXC on Proxmox.
The container get initially created, but later fails as below:

\unable to create CT 100 - command 'lxc-usernsexec -m u:0:100000:65536 -m g:0:100000:65536 -- tar xpf - --zstd --totals --one-file-system -p --sparse --numeric-owner --acls --xattrs '--xattrs-include=user.*' '--xattrs-include=security.capability' '--warning=no-file-ignored' '--warning=no-xattr-write' -C /var/lib/lxc/100/rootfs --skip-old-files --anchored --exclude './dev/*'' failed: exit code 2
 |bash: line 182: exit: A problem occured while trying to create container.: numeric argument required
 -ot@nuc02:~# 

Other containers I have tried works fine. Wondering if Wireguard may have particular needs. Any idea?

Regard,