download newsletter on this position :http://open.silverstripe.com/browser/modules/newsletter/trunk
but after install i got this type of error "Fatal error: Class 'HtmlEditorConfig' not found in C:\wamp\www\SilverStripe-v2.3.1(new)\newsletter\code\NewsletterAdmin.php on line 70" in silverstripe 2.3.1 and if install in silverstripe-v2.3.2-rc2 then error got "[Warning] None of these templates can be found: ProgressBar.ss" so please suggest me..
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