Error Message trying to start Sandbox

[PhilipMoore1953]

(03-30-2019, 09:30 PM)WinXPto10 Wrote:  Sandboxie doesn't support Windows 10 1903 yet

I'm not referencing the "Sandboxie" program but the added
"Sandbox" program that comes included with Windows 1803 and above. https://techcommunity.microsoft.com/t5/Windows-Kernel-Internals/Windows-Sandbox/ba-p/301849