When I go to plex.tv it redirects me in hddps://www.kantarmedia.com/global
[Moderator edit: invalidated the URL]
Chrome shows:
Your connection is not private
Attackers might be trying to steal your information from plex.tv (for example, passwords, messages, or credit cards).
NET::ERR_CERT_COMMON_NAME_INVALID
That means this URL has been hijacked.
Either by your ISP.
Or more likely by some malware on your PC.
