How to Enable Custom Scripting in SharePoint Modern Sites

This post explains the “Access denied. You do not have permission to perform this action or access this resource” error in SharePoint, even if you have full permissions in modern site collection.

Introduction 

 

In this post, we will discuss the “Access Denied” error when you try to upload files in the library or try to create a new folder, even when you have full access to site collections.

 

Error when creating a folder in library:

 

 

 

Error when uploading file:

 

 

 

Reason

 

Scripting capabilities are not enabled with modern sites (and other sites) by default, and cannot be enabled using the admin portal for modern sites.

 

Solution

 

You can enable custom site scripting using the below PowerShell commands, even if allow custom script is selected from the admin panel. 

Connect-SPOService -Url https://tenantname-admin.sharepoint.com
Set-SPOSite -Identity https:// tenantname.sharepoint.com/sites/site -DenyAddAndCustomizePages 0