Mayavi 4.7.4 cdt when trying to view the Python window

Hi.
I am new to Mayavi, but quite proficient in Python and Jupyter.
I installed the Mayavi 4.4 with pip yesterday under Windows 10. The About page reports:
Mayavi version 4.7.4
VTK version 9.1.0
Python 3.9.6
Qt 5.15.2

I was able to start working with the program and with some example files. The problem is that when I try to also visualize the internal Python editor from the View menu, the program crashes to desktop. I also tried to run as administrator, and with compatibility with other older version of Windows, but the issue persists.
Do you have any suggestion?
Thanks.

The issue reports a crash in Mayavi 4.7.4 on Windows 10 when opening the Python window from the View menu, with Python 3.9.6, VTK 9.1.0 and Qt 5.15.2. Start by reproducing the crash after launching an example and inspect the GUI/editor path used by that menu action. Done means the Python window opens without terminating Mayavi.

Written by the indexing model from the issue text.