SharePoint PnP - 403 Forbidden

[biswajayanta]

SharePoint PnP
calls are intermittently failing with error: 403: Forbidden. It happens after the authentication is successful and the script tries to do further actions like Download, upload etc.
It does not fail always but intermittently.
Running Fiddler shows that when the call fails, the bearer token is empty in the request. But, how can the bearer token be there in one run and not in subsequent run....
This issue started at around 13:00 hours GMT on 6 Jun 2022.
Is this issue experienced by other applications or users?
What can be the possible cause and solution?

Reference Error:
RROR: System Exception : Unable to download file from the sharepoint.Downloaded Failed.Check if you have access and File is available in location Get-PnPFolderItem : The remote server returned an error: (403) Forbidden.
At C:\Users\PHJ622-F\Documents\Temp_Multi_download.ps1:6 char:14

• ... sourceItems=Get-PnPFolderItem -FolderSiteRelativeUrl $sourceLibPath - ...

•             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  

  • CategoryInfo : WriteError: (:) [Get-PnPFolderItem], WebException
  • FullyQualifiedErrorId : EXCEPTION,PnP.PowerShell.Commands.Files.GetFolderItem