Can't log in on desktop? SOLVED -- whitelisted signin.nianticlabs.com in AdBlockPlus
I was never able to auth into the community on my Mac, even though I could access it just fine on my phone, and was Google-authed into other sites in Chrome just fine.
I worked around the problem by whitelisting signin.nianticlabs.com in AdBlockPlus.
(And don't get me started on the ethics of ad blockers. I have ABP configured to allow clean ads, but every time I turn it off I see my memory and CPU spike as poorly-written ad code sucks up all my system resources.)