`Initialize-NatNetwork` fails with err: "The provided network configuration is invalid or missing parameters" on WS2019

[profnandaa]

Describe the bug

Initialize-NatNetwork

Are you sure you want to initialises a NAT network? Missing dependencies (Windows CNI Plugins and HNS module) will be installed if missing.
Continue with this operation?
[Y] Yes  [N] No  [S] Suspend  [?] Help (default is "Y"): Y
Creating NAT network
Could not create a new NAT network nat with Gateway 172.22.16.1 and Subnet mask 172.22.16.0/16. HcnCreateNetwork -- HRESULT: 2151350282. Result: {"Success":false,"Error":"The
provided network configuration is invalid or missing parameters. ","ErrorCode":2151350282}
At C:\Users\Administrator\installs\containers-toolkit\containers-toolkit\Public\ContainerNetworkTools.psm1:221 char:17
+ ...             Throw "Could not create a new NAT network $networkName wi ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OperationStopped: (Could not creat...de":2151350282}:String) [], RuntimeException
    + FullyQualifiedErrorId : Could not create a new NAT network nat with Gateway 172.22.16.1 and Subnet mask 172.22.16.0/16. HcnCreateNetwork -- HRESULT: 2151350282. Result: {"Suc
   cess":false,"Error":"The provided network configuration is invalid or missing parameters. ","ErrorCode":2151350282}

To Reproduce
Steps to reproduce the behavior:

1. Follow setup instructions
2. Run Initialize-NatNetwork

Desktop (please complete the following information):

• OS: WS2019