Datastore Viewerでkindを選択すると以下のエラーが発生しますが、 発生する原因は何がありますか？
Server Error A server error has occurred. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
