If YouTube Now shows as enabled on your Channel, yet Switcher Studio shows the "Enable YouTube Now" message, it means the connection needs to be reset. Follow these steps to resolve the issue:
Note: You will need to use a computer for this process.
Go to YouTube > Creator Studio > Live Streaming Dashboard here: https://www.youtube.com/live_dashboard?nv=1
Find the box labelled "ENCODER SETUP"
Click the "Reveal" button.
Click the "Reset" button.
When you open Switcher Studio you should no longer see the "Enable YouTube Now" message.