Hi @Dave Dave ,
As of September 9th, 2024 the option to use the PnP Management Shell app registration for authentication is not available anymore. Refer to https://pnp.github.io/powershell/articles/registerapplication.html on how to register your own application.
You need to register our own Entra ID Application to use with PnP PowerShell instead.
Connect-PnPOnline -Url $AdminCenterURL -ClientId $ClientID -ClientSecret $ClientSecret
Here are my test results:
Note: The new PnP PowerShell module requires at least PowerShell 7.x.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.