If you get the following error when you try to RDP to your VPS :

An authentication error has occured.
The function requested is not supported.
Remote Computer:This could be due to CredSSP encryption oracle remediation.
For more information, see https://go.microsoft.com/fwlink/?linkid=866660

Do the following steps below:

1. Open a Command Prompt window as Administrator.
2. Run the following command to add a registry value:
   

   REG ADD HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters\ /v AllowEncryptionOracle /t REG_DWORD /d 2

Then you should be able to connect to your VPS via RDP. (Remote Desktop)