How to setup _locale parameter in symfony 4.4 so that example.com/locale works well?

I'm having an issue with a symfony 4.4 website and the _locale parameter.

Let's suppose the website url is example.comThere's a prefix to every controller to set the _locale parameters, the default locale being en.The home page example.com works fine.Any url like example.com/locale/xxx works fine.

But every url like example.com/locale is rewrote as example.comlocale which leads to an error.So example.com/en becomes example.comen/example.com/frbecomes example.comfr/ and so on...

It's pretty annoying, can somebody helps me with this please?

Here's my setup:

In annotations.yaml for controllers route :

controllers:    resource: ../../src/Controller/    type: annotation    prefix: /{_locale}    requirements:        _locale: '%app_locales%'    defaults:        _locale: '%locale%'

In services.yaml my parameters are:

parameters:    locale: 'fr' #WM    app_locales: fr|en|    uploads_dir_name: 'uploads'    uploads_base_url: '%env(SITE_BASE_URL)%/%uploads_dir_name%'

Note : the | at the end in fr|en| is needed, the entire rewriting doesn't work without it.

The index controller route:

/** * @Route("/", name="app_home") */public function index(Request $request)

The listener in charge of the locale:

class LocaleSubscriber implements EventSubscriberInterface{    private $defaultLocale;    public function __construct($defaultLocale = 'en')    {        $this->defaultLocale = $defaultLocale;    }    public function onKernelRequest(RequestEvent $event)    {        $request = $event->getRequest();        if (!$request->hasPreviousSession()) {            return;        }        // try to see if the locale has been set as a _locale routing parameter        if ($locale = $request->attributes->get('_locale')) {            $request->getSession()->set('_locale', $locale);        } else {            // if no explicit locale has been set on this request, use one from the session            $request->setLocale($request->getSession()->get('_locale', $this->defaultLocale));        }    }    public static function getSubscribedEvents()    {        return [            // must be registered before (i.e. with a higher priority than) the default Locale listener            KernelEvents::REQUEST => [['onKernelRequest', 20]],        ];    }}

Thank you in advance for your help!