When running the file, prompt:
This Application failed to start because it could not find or load the Qt Platform plugin “Windows”.
Reinstalling the application may fix this problem.
solution:
1. Comment out the code related to matplotlib and find that the above error disappears, indicating that there is a problem with the package matplotlib, re-install 
2 in conda environment. This Application failed to start because it could not find or load the Qtplatform Plugin… The version is too low, Upgrade pytorch
enter the anaconda prompt
activate environment conda activate pytorch
to upgrade PIP install --upgrade pytorch torchvision
to wait for installation conda install pytorch torchvision-c pytorch
Read More:
- python: This application failed to stat could not find or load the Qt platform plugin “windows”
- This application failed to start because it could not find or load the QT platform
- QT encountered in CentOS installation（ qt.qpa.plugin : Could not load the Qt platform plugin “xcb” ）
- The app failed to start because there is no Qt platform to initialize
- Can not start, can not find QT pligins “windows” problem after installing QT vs environment 2021-06-13
- Failed to load plugin jsdoc: Cannot find module ‘eslint-plugin-jsdoc‘
- Failed to load plugin react: cannot find module ‘eslint plugin react’ appears when running Vue project‘
- WSL start QT error qt.qpa.xcb : could not connect to display :0.0
- ImportError: ‘DLL load failed: %1 is not a valid Win32 application.
- Failed to load platform rendering library
- The Java command could not find or load the main class
- After windows VM is installed successfully, it is always prompted that this application may not work properly
- Error: Could not find or load main class ***
- Could not find or load main class
- An error occurred when running ROCR: Failed to load the package ‘caTools’, package or namespace load failed
- Importerror: DLL load failed while importing win32gui: 1 is not a valid Win32 Application.
- Error: could not find or load main class
- Docker start error: failed to start docker application container engine.
- Tomcat9 Error: Could not find or load main class org.apache.catalina.startup.Bootstrap
- Problems encountered after Maven installation or upgrade: could not find or load main class org.codehaus.plexus .class…..