can't access property "fn"

[julienmiclo]

Hello,
someone can help me ?

I have this error can't access property "fn", $ is undefined.

I think i load correctly my files :
1- jqueryUI
2- tomselect
3- mycode

My code :

(function( $ ){
    $(document).ready(function(){
               let config = {
                    sortField: {
                        field: "text",
                        direction: "asc"
                    },
                    plugins: {
                        'remove_button': {
                            'title': 'Supprimer cet élément',
                        },
                        'drag_drop' : {}
                    }
                }
        let tomselect = new TomSelect('#IDSELECT', config);
    })
})(jQuery)

Thank you