i have a problem with PyQt5 Designer. I install PyQt with -pip install PyQt5 and then -pip install PyQt5-tools
everything OK. But when i try to run Designer it open messagebox with error: This application failed to start because no Qt platform plugin could be initialized!
how to deal with it?
I found a way of solving this:
Go to you python instalation folder Python38\Lib\site-packages\PyQt5\Qt\bin
Then copy all of that files to your clipboard and paste them at Python38\Lib\site-packages\pyqt5_tools\Qt\bin
Then open the designer.exe and it should work.
PyQt5 Designer is not working: This application failed to start because no Qt platform plugin could be initialized