Receiving this upon start?
Firstly, be sure you are not on Windows 7 or on Windows Server 2012. Run Windows Server 2016 from now on instead.
Please also make sure your computer date time is calibrated correctly. http://time.is/ should show if your computer date time is any different to their servers. If that fails, delete the Program Files (x86) folder named Cybersole, then reinstall with the latest link.
Lastly, if all else fails and on a server, terminate it then recreate it. That should fix it.
If your problem still persists, please create a support ticket or post in #help in the Discord.