Bis About Plone-5.2.1-UnifiedInstaller-r3 +error message

Attempting to install Plone-5.2.1-UnifiedInstaller-r3 on Windows generates exactly the same error message as Plone-5.2.1-UnifiedInstaller-r2.
"Microsoft Windows [version 10.0.18363.657]
(c) 2019 Microsoft Corporation. Tous droits réservés.

C:\WINDOWS\system32>cd \

C:>cd Plone-5.2.1-UnifiedInstaller-r3

C:\Plone-5.2.1-UnifiedInstaller-r3>windows_install.bat standalone --password=admin

C:\Plone-5.2.1-UnifiedInstaller-r3>python helper_scripts\windows_install.py standalone --password=admin
Creating target directory \Users\Yoga-Siddhi\Plone
Preparing python virtualenv
Traceback (most recent call last):
File "helper_scripts\windows_install.py", line 107, in
vepackagedir = glob.glob(os.path.join(opt.target, 'virtualenv*'))[0]
IndexError: list index out of range

C:\Plone-5.2.1-UnifiedInstaller-r3>"
However Plone-5.2.1-UnifiedInstaller-r3 poses other problems.
Indeed when I wanted to check the .rst, .py files (README.rst, windows.rst, instruction.rst, windows_install.py etc.)
etc, it is impossible to open them, while it is quite possible with Plone-5.2.1-UnifiedInstaller-r2 ..
Here is a first feedback from Windows with
Plone-5.2.1-r3-UnifiedInstaller.
Anyone have an idea of the problem?
Thanks in advance.

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