我在其应用程序源文件夹的终端中测试了故障，以查看错误。问题是，需要重新安装什么，Qt？因为该应用程序已被清除并重新安装了两次。
root@LMC203DT:/usr/bin# luckybackup-pkexec
qt.qpa.xcb: could not connect to display
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.
Aborted (core dumped)
root@LMC203DT:/usr/bin#