This thing is because QT_PLUGIN_PATH is configured in the environment variable
I don't know why it is configured like this, but if it is not configured, running the program with qt will prompt:
That was a pain in the ass, and later found that environment variables can be configured in the project settings of qtcearor:
It’s OK to configure it here. What’s the reason for this error? I guess it’s because I installed too many qt versions.