For NordVPN and possibly others as well you need to use systemd-resolved as the dns resolver.
Manjaro defaults to openresolv
From the message is appears that resolvectl - which is depending on a running and functional systemd-resolved- is causing the issue.
This has been covered in the guide [root tip] [How To] NordVPN on Manjaro
The Arch Wiki contains the information as well NordVPN - ArchWiki
ATTENTION
NordVPN does not leak DNS on Manjaro if setup correctly using systemd-resolved
