Same thing in standalone LR6. "Help" is a link to a currently nonexistent page. Presumably this can be fixed at Adobe's end.
I only get a message saying "Cannot display help." No web reference in the pop up window.
An update called LR 6.0.1 was released earlier today that supposedly fixed the lack of help. Log out and back into CC (Gear/Prefs/Account/Signout) and you should see LR CC at the top with an Update button. The update is not a full install and only takes a minute or two.