Check if "Custom scripts are disabled for the site" using PNP PowerShell
cls $error.Clear() #Portal url $SiteURL= "url of the site" Connect-PnPOnline -Url $SiteURL (your credentials) $site = Get-PnPSite if ($site.DenyAddAndCustomizePages -eq "Disabled") { Write-Output "Custom scripts are enabled for the site." } else { Write-Output "Custom scripts are disabled for the site." }