Silent nextcloud client installation on windows 10, and process which need to be stopped

Hello .
I’m trying to install Nextcloud client silently, using Puppet, on my Windows 10 computers .
I use Nextcloud-2.3.3.1-setup.exe /S as command line , but nothing happens.
if i try without the /S option, and i have a pop up saying ; " Found nextcloud.exe process(s) which need to be stopped. Do you want the installer to stop the for you ? " .
Of course there is no nextcloud already installed.
If I click Yes, the installation just stops, if I click No, i can now finish the installation .
If I try without puppet, just clicking on the exe files, same behavior.
As i’m looking for a full silent installation, this is an issue.

Any idea?

Thanks .