And when i try to install it , i get this message : " invalid file signature ,当我尝试安装的时候,我收到一个信息: "无效文件签名
When a user sends an empty file or enters an invalid file name , the diamond operator returns the uninitialized defined value , causing a crash of the 当用户发送一个空文件或键入无效的文件名时,菱形操作符返回未初始化定义的值,使