Cannot 'Enable' NextDNS

Hey, I have just installed the NextDNS app on Windows 10.
Selecting 'Enable' option from the tray menu seems to do nothing.

Please advise how I can fix that

`my.nextdns.io` displays information that `This device is not using NextDNS.`

My Windows version:

Edition    Windows 10 Pro
Version    21H1
Installed on    5/26/2020
OS build    19043.844
Experience    Windows Feature Experience Pack 120.2212.3030.0

Best, J.