[BUG] ConvertTo-PnPClientSidePage fails at OfficeDevPnP.Core.Pages.ClientSidePage.AvailableClientSideComponents(String name) - A critical error occurred - transformation did not complete

[ollij]

In two customer tenants we have problems converting publishing pages to modern pages using ConvertTo-PnPClientSidePage. In our dev tenants the commandlet functions correctly.

We can overcome the issue by using older version of PnP PowerShell Online module (December 2019, 3.6.1912.0).

Expected behavior

Publishing page transformed successfully to modern page.

Actual behavior

Page transformation report

Modernization Summary Report

Date	Duration	Source Page	Target Page Url	Status
28/12/2020 9.03.05	00:00:01	/Pages/test.aspx		A issue prevented successful transformation

Critical Errors during transformation

28/12/2020 9.03.06 - /Pages/test.aspx

One or more errors occurred. at System.Threading.Tasks.Task1.GetResultCore(Boolean waitCompletionNotification) at OfficeDevPnP.Core.Pages.ClientSidePage.AvailableClientSideComponents(String name) at SharePointPnP.Modernization.Framework.Cache.CacheManager.GetClientSideComponents(ClientSidePage page) at SharePointPnP.Modernization.Framework.Transform.ContentTransformator.Transform(List1 webParts)
at SharePointPnP.Modernization.Framework.Publishing.PublishingPageTransformator.Transform(PublishingPageTransformationInformation publishingPageTransformationInformation)

Individual Page details

Transformation Details: /Pages/test.aspx

• Report date: 28/12/2020 9.03.05
• Transform duration: 00:00:01
• Transforming from site: https://tenant.sharepoint.com/sites/site1
• Cross-Site transfer mode to site: https://tenant.sharepoint.com/sites/modernsite
• Transforming page: /sites/site1/Pages/test.aspx
• Source SharePoint version: Online (16.0.0.20802)
• Mode: Publishing Page Transformation Mode
• A critical error occurred - transformation did not complete

Page Transformation Settings

Property	Setting
Engine version	1.0.2007.0
Overwrite	False
Target Page Name
Target Page Folder
Target Page Folder Overrides Default Folder	False
Keep Page Specific Permissions	True
Remove Empty Sections And Columns	True
Handle Wiki Images And Videos	True
Add Table List Image As Image Web Part	True
Keep Page Creation Modification Information	False
Publish Created Page	True
Post As News	False
Disable Page Comments	False
Skip Url Rewrite	False
Skip Default Url Rewrite	False
Url Mapping File
Term Mapping File
Skip Term Store Mapping	False
Skip User Mapping	False
User Mapping File
L D A P Connection String
Skip Telemetry	False

Transformation Operation Details

Date	Operation	Actions Performed
28/12/2020 9.03.05	Input Validation	Validation checks complete
28/12/2020 9.03.05	SharePoint Connection	Loading client context objects
28/12/2020 9.03.05	SharePoint Connection	Loading target client context object
28/12/2020 9.03.05	Page Creation	Detect if the page is living inside a folder
28/12/2020 9.03.05	Page Creation	In Cross-Site transform mode the original source file name is used
28/12/2020 9.03.05	Page Creation	Just try to load the page in the fastest possible manner, we only want to see if the page exists or not
28/12/2020 9.03.06	Load	Page does not exist in current web
28/12/2020 9.03.06	Page Creation	Checking Page Exists
28/12/2020 9.03.06	Page Creation	Modern page created
28/12/2020 9.03.06	Article page handling	Transforming source page as Article page
28/12/2020 9.03.06	Article page handling	Recognized source page as a Publishing Page - Analyzing web parts and page layouts
28/12/2020 9.03.06	Page Layout Manager	Page uses BlankWebPartPage as page layout, mapping that will be used is BlankWebPartPage
28/12/2020 9.03.06	Article page handling	Splitting images and videos from wiki text - as modern text web part does not support embedded images and videos
28/12/2020 9.03.06	Set Page Title	Setting the modern page title: Test
28/12/2020 9.03.06	Article page handling	Preparing content transformation
28/12/2020 9.03.06	Article page handling	Transforming content
28/12/2020 9.03.06	Content Transform	Transforming web parts

Steps to reproduce behavior

$SourceUrl = "https://tenant.sharepoint.com/sites/site1"
$TargetUrl = "https://tenant.sharepoint.com/sites/modernsite"
Connect-PnPOnline $SourceUrl -UseWebLogin

ConvertTo-PnPClientSidePage -PublishingPage -Identity test.aspx -TargetWebUrl $TargetUrl -LogType File -LogFolder c:\temp -LogVerbose

Which version of the PnP-PowerShell Cmdlets are you using?

• PnP PowerShell for SharePoint 2013
• PnP PowerShell for SharePoint 2016
• PnP PowerShell for SharePoint 2019
• PnP PowerShell for SharePoint Online

What is the version of the Cmdlet module you are running?

The ones we are having problems

• Latest
• 3.23.2007.1

The one that works on

• 3.6.1912.0