Helpdesk site crashing after credentials are entered:
Description: an unhandled exception has occurred during the execution of the current web request... Exception Details: System.MissingMethodException: Method not found: 'Void System.Security.Claims.ClaimsIdentity..ctor(System.Security.Claims.ClaimsIdentitiy)'
See screen shot attached for full error
After uninstalling .net Framework 4.6.1 the website issue appears.
Workaround:
After Uninstalling KB3102467 to remove the .NET Framework, uninstall these .NET Framework Updates as well:
Per 12-May-2016 on Windows Server 2012R2 these are:
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