This can be caused by a few different things.
Firstly, please make sure you are connected to WiFi or have a strong cell signal when downloading the key.
Additionally, all permissions should be allowed (Push Notifications, Locations Services, and Bluetooth). If you aren’t sure if your phone has allowed permissions, the easiest thing to do is delete the app and reinstall it, accepting permissions when the app prompts.
If you still receive the error after following these steps, please contact the Front Desk for assistance.