Been trying to setup iOS automation via Work Flow but an error opens about being unable to open as 'the app may not be installed on this device'

I've tried both 'brain://…' & 'thebrain://…' but neither work. Has the URL changed? Is it no longer available?

iPhone 6s
iOS 10.3.3 
TheBrain 9
Just figured out its probably due to TestFlight. 

Add a Website Forum to your website.

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