Mirror SDK - iOS demo detects proximity but cannot cast content


I’ve attempted to go through the iOS Mirror SDK demo here: https://developer.estimote.com/mirror/cast-from-a-mobile-app/

My iOS application is able to detect entering and exiting the proximity zone, however it is unable to cast content to the Mirror.

During debugging, I found that after the startScan method is called in the device manager, the following delegate method returns an empty array of devices:
public func deviceManager( _ manager: EMSDeviceManager, didDiscoverDevices devices: [Any]) in the MirrorClient

Not sure where to go from here.

Thanks for your assistance,