Re: Spidey sense
Not using Nord, and not defending them but:
Might it be that it's looking desperately for SysD's systemd-resolved.service and/ or openvpn.service but can't find? (which are crap BTW because they leak DNS like a bucket without a bottom, but hey...). Then again, it could also be that something in Devuan points in the wrong direction (e.g. whatever "networkmanager" you're using..?). Did you see this behaviour also with other VPNs, e.g. an open/ free (academic) one for test purposes?