I have the LR mobile app on my iphone, as was able to sign in on it. When I go to sign in with the desktop Lightroom CC, nothing happens. I click "Getting started with lightroom mobile" then click "Sign in" and nothing. I should note that this would be my first time to sign in for sync with the desktop app.
Thanks for the quick reply. Sure enough, after the update I was able to sign in, and sync worked.
You are Welcome, Glad to help.