Hi, I joined today just to let you know that I have also been experiencing the issues as the other users in theis thread with NordVPN and glasswire.
I use windows 10 and the free version of glasswire - I use AVG antivirus.
Problem started for me over a month ago - the nord client would say I was connected, but I was unable to connect to any website.
I spend an afternoon with Nord Support who were unable to resolve the issue and i was unable to connect with the Nord App - I then started to use the OpenVPN client to connect to Nord - this worked fine until recently (last week?) - now the same happens with the openvpn client.
I decided to try a test on my laptop which also runs win10, and has never had glasswire installed and the nord client works fine.
back to problem desktop - I closed Glasswire using the taskbar icon and still was unable to connect, I then killed all memory processes related to glasswire, and now Nord client is working and i can connect to websites again…
having identified glasswire as the problem i did some googling and ended up on this thread…
hopefully you can findout why this is happening 
thanks