Laravel - Uncaught TypeError: Cannot read properties of null (reading 'value')

I'm trying to use lightpick datepicker on my application. Unfortunately this works when I don't follow standards, and doesn't work when I do.
Blade :

@section('page_script')
    <script src=""></script>
    <script src=""></script>
    <script src=""></script>
    <script src=""></script>
@endsection

@section('content')
    @include('planning.partials.planningStatsForm')
@endsection

datePicker.js:

var picker = new Lightpick({
    field: document.getElementById('ddebut_picker'),
    secondField: document.getElementById('dfin_picker'),
    repick: true,
    lang: 'fr',
    singleDate: false,
    selectForward: true
});

Error (if I use the above code) :

If I use the script tags inside @section('content') and do no use separate @section('page_script') section then everything works perfectly. But for the current code, it doesn't work. I haven't changed anything in the js, controller, blade or model.

via Chebli Mohamed