If attempting to connect to your VPS over Remote Desktop Connection results in the above error, please follow the steps below. This is a known issue with Windows Server 2019 and has a simple fix.
1) Please connect to your VPS over NoVNC (or via a third-party VNC tool).
2) Once connected to your VPS and you are at your desktop, right click on the start menu, click on "Windows Powershell (Admin)" and let Windows Powershell open.
3) Once Powershell has opened; run the following command.
REG ADD "HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server" /v MaxOutstandingConnections /t REG_DWORD /d 65536
4) You should be met with a return: "Operation Completed Successfully". You may now close your VNC window and connect over Remote Desktop again. If this does NOT work, go ahead and open a ticket HERE