尝试安装应用程序时。弹出窗口显示如下： 无法安装{AppName} 该应用无效，因此无法安装。再试一次。
答案 0 :(得分：9)
Testflight当前遇到服务器问题。
您可以在此处查看当前状态：
https://developer.apple.com/system-status/
TestFlight - 1 Issue, 1 Resolved Issue
Issue: Today, 10:11 AM - ongoing
Some users are affected
Users are experiencing a problem with this service. We are working to resolve this issue.
Resolved Issue: 06/26/2019, 10:30 AM - Today, 3:00 AM
Some users were affected
Users experienced a problem with this service.