Chaosvpn: <ERR> tincd manager slave has died with returncode 0, status 0

Hi there,

I have trouble with chaosvpn/tincd crashing. Posting here before creating a bug report. Versions:

OpenWrt 18.06.4
chaosvpn v2.18 (from openwrt 18.06.4 repo)
tincd 1.0.35 (from openwrt 18.06.4 repo)

When started, with valid configuration and keys in place, chaosvpn/tincd crashes:

root@router:/etc/tinc# chaosvpn -r -c /etc/tinc/chaosvpn.conf
<INFO>  ChaosVPN client v2.18 starting.
<ERR>   tincd manager slave has died with returncode 0, status 0.

Any ideas about what the problem can be?