Security Token Check Failed: How do I resolve this error when using the user interface (UI)

Our user interface is now browser based and this issue has been experienced by a few customers. Check to see if you have added https://127.0.0.1 and localhost to your trusted site list in Internet Explorer. Once that's done, you shouldn't have any issues using the GUI.

Go to 'Internet Options'

Select the 'Security' tab
Select 'Trusted Sites'
Enter '127.0.0.1' and 'Add'
Enter 'localhost' and 'Add'
Click 'Close'
Click 'OK'

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In some cases, a Cerberus service restart is needed.  If you need to restart the service, File>Exit from the Cerberus FTP Server.  Open services.msc, locate Cerberus FTP Server and restart the service.  Once the service has started back up, you can start Cerberus.