【解决问题】This application failed to start because no Qt platform plugin could beinitialized.

报错内容：

This application failed to start because no Qt platform plugin could be
initialized. Reinstalling the application may fix this problem.
Available platform plugins are: direct2d, minimal, offscreen, windows.

原因分析:

多为 qdirect2d.dll、qminimal.dll、qoffscreen.dll、qwindows.dll  版本问题，

exe可执行文件, 使用了版本不一致的 .dll 动态库。

需要检测操作系统环境变量制定的插件平台库版本：我本地有如下两个版本，分别测试，找一个正确的。

D:\msys64\mingw64\share\qt5\plugins\platforms
D:\Qt\6.6.3\mingw_64\plugins\platforms
C:\Program Files\KDiff3\bin\platforms

QT_PLUGIN_PATH = D:\msys64\mingw64\share\qt5\plugins

解决办法：

将如下文件

\Anaconda3\Lib\site-packages\PySide2\plugins\platforms\qminimal.dll

\Anaconda3\Lib\site-packages\PySide2\plugins\platforms\qoffscreen.dll

\Anaconda3\Lib\site-packages\PySide2\plugins\platforms\qwindows.dll

复制(或覆盖)到这个文件夹即可

\Anaconda3\Library\plugins\platforms\