Even after accepting the terms, if the browser contains old, stale cookies the application may not be able to save cookies. The log contains
Error unprotecting the session cookie.
System.Security.Cryptography.CryptographicException: The key … was not found in the key ring.
If the web application works in a new incognito window, clear the old cookies in your browser.
In Google Chrome
- In the Chrome menu select Clear Browsing Data…
- On the Clear browsing data page select All time, and Cookies and other site data