So - as of yesterday, Chrome worked fine. Through the web interface. Now it won't connect. Strangely, Firefox and Edge on the same machine as Chrome connect just fine...hell...the Plex CHROME app, on the very same chrome installation, works just fine....and it even works fine in chrome incognito windows....but normal chrome itself? Nope. I've actually tried backing up my chrome user data folder and starting "fresh" in chrome..and it worked fine. I've completely cleared my cache, disabled all extensions...I just don't know.
I will not start from scratch with Chrome...too much invested into it to simply delete it all cause Plex can't get it's **** together. Never had these issues before Plex forced the log in crap on your for local network servers.