Please note! Since March 8, 2018, with the latest updates to Windows, the error may occur when connecting to remote servers (RDP). If you see this message, it means that you do not have the latest updates on your computer or server, including security entries.
In this case, you need to update your server or computer to the latest updates (Start -> Control Panel - Windows Update)
You can contact our support staff, they will help you!
Have a nice day!