When selecting the "logout" option within the QPMuser site the following error occurs: "Error in the application System error occurred. For more information, view the event log."
Event log error:
"...System.Web.Mvc.HttpAntiForgeryException (0x80004005): The required anti-forgery form field "__RequestVerificationToken" is not present."
Cached information in the browser.
Clear browser cache, restart IIS and try again.