CSOM for anonymous site.

Error: The Method “GetItems” of the type “List” with id “{Lists’s Guid}” is blocked by the administrator on the server

While using SharePoint Client Object Model when I got the error above.

To resolve perfom below powershell script:

$web = Get-SPWebApplication -Identity 'http://your web address'

$web.ClientCallableSettings.AnonymousRestrictedTypes.Remove( [Microsoft.SharePoint.SPList],"GetItems")

$web.Update()

Foe more refer link