KB: Android 7.0 (Nougat)
Due to changes made in Android 7.0 it is no longer possible for us to read the MAC address or IMEI of a device. This is due to a security change within the OS itself and apps can no longer read this information unless the app is a "Device Owner" (which Kiosk Browser is not).
Updated on: 04/08/2020
Thank you!