Issue with Mendix app

I’m going through the training course Become a Rapid Developer. I’m in Module 10, here ( I’ve downloaded the Mendix app, and I touch Scan QR code, but when I try to scan it on my phone I get a screen that tells me to tap 3 fingers on the screen to open the context menu. Tapping 3 fingers does nothing. What am I doing wrong?
1 answers

When i download the published app and scans the qr code. the app crashes immediately