Windows 10 64-bits
Python 3.8.10 64-bits
PySide2 5.15.2
PyInstaller 4.3
UPX 4.1.0
it raises:
"This application failed to start because no Qt platform plugin could be initialize"
Solution
in spec files, add
upx_exclude=['qwindows.dll', 'qwindowsvistastyle.dll'],