Add-PnPJavaScriptLink will raise the following error "Access denied. You do not have permission to perform this action or access this resource."

Question

I run the following PnP script using the office 365 global admin, to inject a javascript file to our modern communication site:-

PS C:\WINDOWS\system32> Connect-PnPOnline "https://****.com/sites/DocumentProcess/" -UseWebLogin

PS C:\WINDOWS\system32>  Add-PnPJavaScriptLink -Name HomeLink -Url "https:/****.com/sites/DocumentApproval/SiteAssets/approvalprocess.js" -Scope Site
Add-PnPJavaScriptLink : Access denied. You do not have permission to perform this action or access this resource.
At line:1 char:2
+  Add-PnPJavaScriptLink -Name HomeLink -Url "https://***.sha ...
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : WriteError: (:) [Add-PnPJavaScriptLink], ServerUnauthorizedAccessException
    + FullyQualifiedErrorId : EXCEPTION,SharePointPnP.PowerShell.Commands.Branding.AddJavaScriptLink

but i got this error as shown above "Access denied. You do not have permission to perform this action or access this resource."? any advice?

Answer 1

Hi @john john ,

I could reproduce this issue on a modern site, however it could run successfully on a classic site.

As said in the following article, “Add-PnPJavaScriptLink” is valid only for SharePoint classic site experience.
https://learn.microsoft.com/en-us/powershell/module/sharepoint-pnp/add-pnpjavascriptlink?view=sharepoint-ps

Since the site you applied the script to is a modern site, It cannot be successfully executed. You can have a try on a classic site.

I hope this information has been useful, please let me know if you still need assistance.

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