I uploaded the package and install to an empty directory on my server, and created a new DB for the occasion.
But when launching the install process, a few seconds later I got an error screen telling me:
A configuration file already exists in this location. You have two options:
Empty this root directory and recopy the package and installer.
Copy package from "wp-snapshots" directory back up to your root (same location as installer.php) and delete the wp-config.php file.
This is weird, of course, since the directory was empty to start with.
Opening that directory, I can see the installer unpackaged pretty much everything, as far as I can tell (I didn't count all files of check every directory) -- EXCEPT for the "wp-snapshots" folder, which only contains an index.php file.
In my database, the tables were created, but are all empty (no posts content, etc). Unsurprisingly, I get an "Error Establishing Database Connexion" when trying to access the directory with a browser.
The installer-log.txt file is blank.