I am getting this error when I try and export a Client Side Page using Get-PnPProvisioningTemplate:-
powershell.exe Warning: 0 : 2018-03-29 15:45:41.9596 [Client Side Page Contents]  [Information] This page is not a valid client side page and can't be extracted. Underlying error = Page About.aspx is not a "modern" client side page. 720ms 673a7b73-01bf-4e81-acc4-399eec9f6d5a
How does the Provisioning Engine determine this. @VesaJuvonen
This was working before the March update. Does anyone know what has changed ?