I have Meraki switches and APs configured to integrate with Cisco ISE 3.1. The ISE internal CA is the issuer for BYOD devices. When a client connects to the WiFi, the iPhone captive mini browser opens correctly and then redirects the user to the ISE BYOD portal. However, when the user initiates the onboarding process by clicking the start button, the mini browser displays an alert saying, 'Your browser is currently unsupported.' I have tried three different iPhones, all of which are different models, and they all encounter the same error.
It seems that if I click cancel without an internet connection and then start Safari, it works. Has anyone encountered this issue before and knows the reason behind it? Thank you.