when you "import the saved configuration", are you manually parsing out the
CA, pasting/saving into a new file, and then pointing the network-manager to
that CA file? Or is yours working by just directing it to the config.ovpn
file?
I import a folder containing : ca.crt, ta.key, user.cert, user.key and the
config file(OpenVPN Client Configuration)
the authentification is by certificates (not by password as NordVPN).
Making a test from the https://nordvpn.com/tutorials/linux/openvpn/ ,one has
to create the CA.cert file and point Network Manager to it (see screenshot
below).