Might be too late, but at least you can make others aware of the situation with Parrot reseller here..
https://iptv.community/threads/report-a-user.8844/page-4
you could try "save online" on smart iptv portal, as lg's are prone to using all the dramm memory up, whilst the app is loading tons of lists of channels, that you do not want, also check "detect epg" when adding your m3u url, instead of adding an epg url, as the epg also used up a ton of lg...
Is your Z8 mac locked to the stalker portal address ok? Try a factory reset and reinstall the Nov firmware update, when you connect. Also are you connecting via any sort of VPN on your router, hard coded in or otherwise?
You could try the portal (might have to regenerate the stalker url again...
I remember there being some issue with the LG 2018 / Q1 2019 shipped models, that the HWid mac reported was not the correct one shown to the Gui on the LG software, thus not the real mac that can be activated, I did a factory reset of the TV, then reinstalled Smart IPTV from LG app store, got...