Which watchpoints can be ruled out?
Select and bind your EMM – Does the EMM you use support QR Code provisioning?
Select OS version/device – Does the device support QR code enrollment?
Create/sync users or groups – Is the user set up to be able to enroll devices?
Configure provisioning – Are the DPC extras specified in the QR code valid?
Provision device – Does the device have network connectivity in order to download the DPC?