Siril Python scripts cannot be loaded

Two days ago I downloaded the new Siril version 1.4.1 and installed it on my computer, which is currently running Windows 11. After starting the program I get the following message:

note: This error originates from a subprocess, and is likely not a problem with pip.
log: Warning: The Siril-Python module cannot be installed or updated.

I have tried uninstalling and reinstalling the program several times and I still have these problems with the Pyton scripts not being able to download or start in the program. When I call a script I get another error message:

Error: python is not ready yet. This can happen on the first start if the Python venv and modules setup is not yet complete. Please wait a moment for a completion message in the log and try again.

have installed an extra firewall on the computer. When I switched on or activated this software, after a few tries I was able to run the Pyton scripts.
The same problems also appeared on my laptop with Windows 10, which could not be solved after starting the program several times.
So I copied the files from my Win 11 computer to the laptop with Win 10 and then I was able to use all the scripts there.
What is the cause of this?