Why does the window look so bad?

Question

Python

In general, I wrote a simple program that displays a login window. And so, I wrote, everything works fine, and I decided to make an .exe file through Pyinstaller. I did it and that's what happened:

Instead:

How so. It looks like it was opened on a very old Windows. Is it possible in general to add some textures to Qt Designer there on the buttons or on the background of the window, so that it doesn’t look so sad?
Thanks for the info))
Python 3, PyQt5.

Answer 1

Try an older version of pyqt(5.9.2), the newer ones had problems with pyinstaller