We have a solution that uses the Dynamicweb Active Directory Login provider. It has worked as expected for more than two years. But recently the solution was upgraded to v.9.6.5. After that if a user login (using the AD login provider) with wrong username or password the user gets the error page shown below. When any other page on the site is requested the same error page is returned until the cookie "DW_ExtranetSessionCookie" is deleted. What can be wrong? How can it be fixed?