If you open cmd and type rasdial devicetunnel and it comes back as Parameter is incorrect. Please follow the guide below.
Open CMD as Administrator
Next run the following commands
netsh int ip reset
netsh int ipv6 reset
netsh winsock reset
Then Restart your computer.
Then open Device Manager
You will find to find the following Network Adapters and uninstall them by right mouse clicking them and clicking uninstall.
At the top click Action -> Scan for hardware changes
Then rerun your Device.ps1 script found on Microsoft’s website ( https://docs.microsoft.com/en-us/windows-server/remote/remote-access/vpn/always-on-vpn/deploy/always-on-vpn-deploy-deployment ).