Allow to Create Child Commutication Site in SharepointOnline

#Add references to SharePoint client assemblies and authenticate to Office 365 site
# get from https://www.nuget.org/packages/Microsoft.SharePointOnline.CSOM/16.1.8613.1200
Add-Type -Path "C:\SharePoint Online Management Shell\Microsoft.SharePoint.Client.dll"
Add-Type -Path "C:\SharePoint Online Management Shell\Microsoft.SharePoint.Client.Publishing.dll"
Add-Type -Path "C:\SharePoint Online Management Shell\Microsoft.SharePoint.Client.Runtime.dll"

$Username = "*@*.onmicrosoft.com"
$Password = ConvertTo-SecureString "*" -asplaintext -force
$Site = "https://*.sharepoint.com/sites/CommunitationSite-Parent/"
$Context = New-Object Microsoft.SharePoint.Client.ClientContext($Site)
$Creds = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($Username,$Password)
$Context.Credentials = $Creds

 #Create SubSite
$WCI = New-Object Microsoft.SharePoint.Client.WebCreationInformation
$WCI.WebTemplate = "SITEPAGEPUBLISHING#0"
$WCI.Description = "Child"
$WCI.Title = "Child"
$WCI.Url = "CommunitationSite-Child"
$WCI.Language = "1033"
$SubWeb = $Context.Web.Webs.Add($WCI)
$Context.ExecuteQuery()