Thread:Project:Support desk/Latest upgraded WIKI 1.25.1 shows 'Permission error' page instead go for 'Special:UserLogin' Page !

I have upgraded WIKI 1.25.1 from earlier version 1.21.2 and face an issue like when user didn't login to the site still it shows 'Permission error' page instead it go for redirecting to the Login Page ! But It was working good with WIKI 1.21.2 in AD authentication.

Kindly let me share the solution for the issue.

Thanks in Advance ! Sanjay