Please follow this article if you are seeing a Add and Customize permissions required dialog window after installing KWIZ Apps
You may see this dialog window after installing KWIZ Apps in your SharePoint 2019 environment.![](https://kb.kwizcom.com/hubfs/image-png-Mar-23-2023-07-08-18-5982-PM.png)
- Login to your SharePoint Farm SharePoint 2019 On-Premise
- Open SharePoint 2019 Management Shell as administrator
- Execute the following PowerShell command:
(Get-SPSite -Identity "https://your-host/sites/modern-site").DenyPermissionsMask =
[Microsoft.SharePoint.SPBasePermissions]::EmptyMask