Several cmdlets for managing client side pages fails with 'Object reference not set to an instance of an object'

Reporting an Issue or Missing Feature

Several cmdlets for managing client side pages has stopped working and throws Object reference not set to an instance of an object. It doesn't happen if the page was created through PnP PowerShell, but it fails for all pages created or modified through the SharePoint UI.

Expected behavior

Set-PnPClientSidePage, Get-PnPClientSidePage, Add-PnPClientSideWebPart should work even if the page has been created or edited in the SharePoint UI.

Actual behavior

The cmdles return the following exception: Get-PnPClientSidePage : Object reference not set to an instance of an object. At line:1 char:1

Get-PnPClientSidePage -Identity "TEST3"


+ CategoryInfo          : WriteError: (:) [Get-PnPClientSidePage], NullReferenceException
+ FullyQualifiedErrorId : EXCEPTION,SharePointPnP.PowerShell.Commands.ClientSidePages.GetClientSidePage

Examples of cmdlets that fails with this exception:

Set-PnPClientSIdePage -Identity "TEST3" -Name "test10" Add-PnPClientSideWebPart -Page "TEST3" -DefaultWebPartType BingMap Get-PnPClientSidePage -Identity "TEST3"

Steps to reproduce behavior

Create a new page on a communication site through the web browser
Run any of the cmdlets above on that page

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

[ ] PnP PowerShell for SharePoint 2013
[ ] PnP PowerShell for SharePoint 2016
[x] PnP PowerShell for SharePoint Online

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

3.6.1902.2

How did you install the PnP-PowerShell Cmdlets?

[ ] MSI Installed downloaded from GitHub
[x] Installed through the PowerShell Gallery with Install-Module
[ ] Other means

pnp / PnP-PowerShell