Permalink structure error both with local and remote install !

Hi

I have an issue with WordPress permalinks. If I set them to /%postname%/
I get a 404 WordPress error.

I created a WordPress website offline, using EasyPhp WebServer 14.1. In this website, my pages had default names, like : ?p=123

After putting it online, I created an empty .htaccess file at the root of the folder, with 777 rights (just to be sure it could be written). Then I changed the permalink option into “name article”.

The .htaccess file has been modified, it contains now :

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress

However, all the pages (each of them but the home page) can’t be found. I get something like

Oops ! That page can’t be found. It looks like nothing was found at this location. Maybe try one of the links below or a search?
The website URL is : https://www.vogliadimare.fr

The most weird thing is that I get exactly the same error on my local website !

I tried to add garbage text to the .htaccess : I got a 500 HTTP error, so mod_rewrite() is enabled.
I tried to manually add the rewriting rules to .htaccess, the result is the same.

I’ve done this dozens of times, but now I’m stuck ! What’s wrong ?
Where could this come from ?

Thanks