We recently rolled out Zone Director and started issuing guest pass keys to employees and visitors. One employee with an iPhone SE reported his key didn't work so I issued him a new one. That didn't work either, so I had him demo the problem. When the login page pops up, he enters the key and then... northing; just a little spinner at the top of the screen. Problem persists after phone is restarted. I also have an SE and have no problems. Has anyone seen this before and know how to resolve it?