Get-PnPWikiPageContent : The property or field has not been initialized. It has not been requested or the request has not been executed. It
may need to be explicitly requested.
At line:1 char:6
+ $p = Get-PnPWikiPageContent -ServerRelativePageUrl '/sites/entwiki/Pa ...
+ CategoryInfo : WriteError: (:) [Get-PnPWikiPageContent], PropertyOrFieldNotInitializedException
+ FullyQualifiedErrorId : EXCEPTION,SharePointPnP.PowerShell.Commands.Publishing.GetWikiPageContent
The following works, this confirms the file is available: