Can't access an application check your browser

1. Clear history or cache.
2. Allow pop-ups.

Safari Enable Cookies & Cross-Site Tracking

Duo on iOs:  if you receive the message "You need to enable cookies in order to remember this device," you likely have "block cross site tracking" and/or "block all cookies" turned on in Safari.  To fix this:

1. Navigate to Settings.
2. Tap Safari.
3. Scroll down to Privacy and Security.
4. Disable Prevent Cross-Site Tracking (Swipe the toggle left so that it is black, not green).
5. Disable Block all Cookies (Swipe the toggle left so that it is black, not green).

Manage cookies and website data in Safari

Chrome Enable Cookies

Clear, enable, and manage cookies in Chrome (external link)