Having same issue. Tried full URL (desktop & mobile versions) and 11 characters after the v=
on hub version 1.5.2

Can a button be connected to the hub and to a phone?

I'd like to build a system that will work from home (via hub) but will also work from alternate locations (via phone) - connecting/disconnecting from phone/hub isn't a deal breaker but I want to avoid re-configuring buttons.

The system is going to track baby activities. e.g., 1 press = start sleep. 2 presses = stop sleep.

I'd rather have the buttons travel with the baby - will this work? Do you have a better way to do this?

(I'm considering purchasing a hub + button set, apologies if this question is obvious post-purchase - no answers in forum search or documentation)