This is Because you do not have a valid Security Certificate .
这是因为您没有一个有效的安全性证书。
It either provides information or facilitates a change to business data from one valid and consistent state to another.
它提供信息或简化业务数据从一个有效的、一致的状态向另一个状态的转变。
The user name should consist of alphanumeric characters and be a valid structure for all systems within an organization so that each person only has one user name.
用户名应该由字母数字字符组成，并且对于组织内部所有的`系统都应该是有效的结构，以便每个人只使用一个用户名。
She had valid reasons for not supporting the proposals.
她有充分的理由不支持这些建议。
They have a valid claim to compensation.
他们有要求赔偿的合法权利。