求助:jira5.1没有outgoing mail页面,无法设置邮件服务

在system——mail页面没outgoing mail界面,点mail server弹出提示:
Not Found (404)
WebworkConfigurationNotFoundException{class=class webwork.config.XMLActionConfiguration, message=‘No such view mapping’, name=‘OutgoingMailServers.actionInfo’}
Could not find what you were looking for. Maybe you should raise an issue.
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不知道怎么解决。。。