I had been running ExpressVPN on my system for some time. Initially installed the CLI tool, then later switched to the GUI version (using the installer provided by ExpressVPN). I'd recently been having some problems with it, where upon booting up my system, it would take ages to connect to a server, often requiring me to go through a cycle of stopping / disabling / enabling / starting the expressvpn service in order to get a connection.

I was kind of getting fed up with it and wanted to explore other providers. So I removed it (rm -rf /opt/expressvpn), and removed the service. However, I think there must have been some leftover remnants somewhere, because now I am getting the weird thing that, while normal websites load fine, the expressvpn page itself (which I need to access to cancel my subscription) does not load.

Doing some searching around, it seems like it could be a DNS server issue. Currently, I have

/etc/resolv.conf
nameserver 10.250.0.10
nameserver 10.250.0.28

I tried changing it manually to the Cloudfare values

/etc/resolv.conf
nameserver 1.1.1.1
nameserver 1.0.0.1

and creating the file

/etc/NetworkManager/conf.d/dns.conf:
[main]
dns=none

to prevent NetworkManager from touching it, but still haven't been able to find a solution.

Trying dig just times out

dig expressvpn.com
;; communications error to 10.250.0.10#53: timed out
;; communications error to 10.250.0.10#53: timed out
;; communications error to 10.250.0.10#53: timed out
;; communications error to 10.250.0.28#53: timed out

; <<>> DiG 9.20.24 <<>> expressvpn.com
;; global options: +cmd
;; no servers could be reached

(and similar results with the cloudfare settings)

Any assistance in troubleshooting this would be greatly appreciated.