Locale not stored in cookie, even it is not executed the onLocaleChange event

[wwtvishal]

Hi,
Please help me with the issue.
I had installed the dependency by executing composer command, I have Lunatics package now in my vendor folder and I did configuration too.
My Config:

lunetics_locale:
    guessing_order:
        - cookie
    allowed_locales:
        - en
        - fr
    guessing_excluded_pattern: ^/admin
    cookie:
        set_on_change: true
    switcher:
        #use_controller: true
        show_current_locale: true
        #use_referrer: true
        redirect_to_route: fallback_route
        redirect_statuscode: 302
    disable_vary_header: true

I added the {{ locale_switcher() }} code to load the template of Locale Switcher.

When I change the language it is changing in URL ?_locale=en or _locale=fr but it is not changing translation even not sonata page as per requested language.

As you can see i set guessing as a cookie but it is not stored in a cookie too, i tryied to debug the event function in lunetics\locale-bundle\Lunetics\LocaleBundle\EventListener LocaleUpdateListener.php

public function onLocaleChange(FilterLocaleSwitchEvent $event)
    {
        echo $this->locale = $event->getLocale();die();
        $this->updateCookie($event->getRequest(), $this->localeCookie->setCookieOnChange());
        $this->updateSession();
    }

but the listener is not calling, I don't know maybe I missed some configuration or anything.

Please help me to solve this problem and hope my site will one in cookie locale instead of default locale always.

Thanks In Advance