Error :"the given key was not present in the dictionary " while creating publishing page in Powershell CSOM

Question

I am facing error:"the given key was not present in the dictionary " while i am creating publishing page in sharepoint online using powershell CSOM.

Here is my code:

 $subsiteCtx=New-Object Microsoft.SharePoint.Client.ClientContext($subsiteUrl)
            $subsiteCtx.Credentials = $credentials
            $subsiteCtx.ExecuteQuery()
            $subsiteweb=$subsiteCtx.Web  

$ctx = New-Object Microsoft.SharePoint.Client.ClientContext($siteUrl) 
             $ctx.Credentials = $credentials
             $ctx.ExecuteQuery()
             $pageLayoutList = $ctx.Web.Lists.GetByTitle("Master Page Gallery")
             $ctx.Load($pageLayoutList)
             $ctx.ExecuteQuery()

             $pageLayoutQuery = New-Object Microsoft.SharePoint.Client.CamlQuery  
             $pageLayoutQuery.ViewXml = "<View Scope='RecursiveAll'><Query><Where><Eq><FieldRef Name='FileLeafRef'/><Value Type='Text'>"+$pageLayoutName+"</Value></Eq></Where></Query></View>"  

             $pageLayouts = $pageLayoutList.GetItems($pageLayoutQuery)  
             $ctx.Load($pageLayouts)  
             $ctx.ExecuteQuery()  
             $pageLayout = $pageLayouts[0]

                 Write-Host $pageLayouts.Count "-" $pageLayout.Id 

             #Get the publishing Web  
             $pubWeb = [Microsoft.SharePoint.Client.Publishing.PublishingWeb]::GetPublishingWeb($subsiteCtx, $subsiteCtx.Web)  
             $subsiteCtx.Load($pubWeb)    
             $subsiteCtx.ExecuteQuery() 

             $pageInfo = New-Object Microsoft.SharePoint.Client.Publishing.PublishingPageInformation  
             $pageInfo.Name = $pageName  
             $pageInfo.PageLayoutListItem = $pageLayout  
             $page = $pubWeb.AddPublishingPage($pageInfo)  
             $subsiteCtx.Load($page)  
             $subsiteCtx.ExecuteQuery() 

Answer 1

Here is my sample test script, create publishing page in sub site.

Add-Type -Path "c:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\ISAPI\Microsoft.SharePoint.Client.dll" 
Add-Type -Path "c:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\ISAPI\Microsoft.SharePoint.Client.Runtime.dll"
Add-Type -Path "c:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\ISAPI\Microsoft.SharePoint.Client.Publishing.dll"

$siteUrl = "https://tenant.sharepoint.com/sites/Developer"
$UserName = "[email protected]"
$Password = ConvertTo-SecureString "pw" -AsPlainText -Force
$credentials =New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($UserName, $Password) 

# - Uncomment above lines incase of SharePoint online 
$ctx = New-Object Microsoft.SharePoint.Client.ClientContext($siteUrl) 
$ctx.Credentials = $credentials 

$rootWeb = $ctx.Site.RootWeb
$ctx.Load($rootWeb)
$ctx.ExecuteQuery()

$mpList = $rootWeb.Lists.GetByTitle("Master Page Gallery")
$camlQuery = New-Object Microsoft.SharePoint.Client.CamlQuery
$camlQuery.ViewXml = '<View Scope="RecursiveAll"><Query><Where><Eq><FieldRef Name="FileLeafRef" /><Value Type="Text">ArticleLeft.aspx</Value></Eq></Where></Query></View>'
$items = $mpList.GetItems($camlQuery)
$ctx.Load($items)
$ctx.ExecuteQuery()

$tpLayoutItem = $items[0]
$ctx.Load($tpLayoutItem)

$web = $ctx.Site.OpenWeb("test")
$pubWeb = [Microsoft.SharePoint.Client.Publishing.PublishingWeb]::GetPublishingWeb($ctx, $web)
$ctx.Load($pubWeb)

$pagesList = $web.Lists.GetByTitle("Pages")

$pubPageInfo = New-Object Microsoft.SharePoint.Client.Publishing.PublishingPageInformation
$pubPageInfo.Name ="testplaa.aspx"
$pubPageInfo.PageLayoutListItem = $tpLayoutItem
$pubPage = $pubWeb.AddPublishingpage($pubPageInfo)

$ctx.Load($pubPage)
$ctx.ExecuteQuery()

$listItem = $pubPage.get_listItem()
$ctx.Load($listItem)
$ctx.ExecuteQuery()