Spotify is blocked despite whitelist ... but ... works from IE

I'm running pihole on a Synology Diskstation with Debian chroot running.

To install, I followed instructions here

Now, per your suggestion I tried (from a Putty terminal)

root@DiskStation:/# sudo systemctl -I status dnsmasq
systemctl: invalid option -- 'I'

Being a bit of a noob much of what I am doing is only half-understood, so I appreciate your patience and further insructions. i.e. how would I determine if the DiskStation is running NetworkManager ?