Kerberos SSO Authentication is not working in Peopletools 8.56. User gets error message with signon page " Authorization Error - Contact Security Administrator" when user open new browser session. However if user click same application link Application login is successful. We have been using Kerberos SSO since last 5+ years and was working in Tools 8.53 and 8.55. however it stopped working once we upgrade tools to 8.56.