CC-3879 : Now Playing-> Guest's clicking on Preview pops up error window

airtime_mvc/application/configs/ACL.php

@@ -34,11 +34,11 @@ $ccAcl->allow('G', 'index')
 	  ->allow('G', 'api')
       ->allow('G', 'schedule')
       ->allow('G', 'dashboard')
+      ->allow('G', 'audiopreview')
       ->allow('H', 'usersettings')
       ->allow('H', 'plupload')
       ->allow('H', 'library')
       ->allow('H', 'playlist')
-      ->allow('H', 'audiopreview')
       ->allow('A', 'playouthistory')
       ->allow('A', 'user')
       ->allow('A', 'systemstatus')