Symptom
After entering the passcode, if any, accepting AUP, and transitioning to the success page, the success page is blank and the Done button not enabled.
Conditions
ISE 3.1
Central Web Auth
Wireless with an ISE Hotspot Portal, which has the auth success settings configured to take guest to a URL
Captive Bypass Portal is disabled to use Captive Network Assistant (CNA)
An iDevice as the client
Workaround
In the success page portal customization, add a Javascript to "Optional Content 2". Below are example JavaScripts:
To only refresh the page after 3 seconds:
setTimeout(function () {
location.reload(true);
}, 3 * 1000);
To redirect to another page:
setTimeout(function () {
location.replace(?http://www.cisco.com?);
}, 3 * 1000);
Further Problem Description