Laravel-datatables: le tri ne fonctionne pas dans les tables de données côté serveur

J'utilise des tables de données yajra avec ajax et un script côté serveur. Ma recherche fonctionne bien, mais lorsque je clique sur le bouton de tri, rien ne se passe.

Mon contrôleur

$suppliers = DB::table("suppliers")
                        ->select(
                            'suppliers.id', 
                            'suppliers.created_at', 
                            'suppliers.email',
                            'suppliers.status', 
                            'companies.id as company_id',
                            'companies.name', 
                            'company_categories.title',
                            DB::raw('
                                (select COUNT(promotions.company_id) FROM promotions WHERE promotions.status = "pending" AND promotions.company_id = companies.id) as total')
                        )
                        ->leftJoin('companies','companies.supplier_id','=','suppliers.id')
                        ->leftJoin('company_sub_categories','company_sub_categories.id','=','companies.sub_category_id')
                        ->leftJoin('company_categories','company_categories.id','=','company_sub_categories.company_category_id')
                        ->groupBy('suppliers.id', 'suppliers.created_at', 'suppliers.first_name','suppliers.last_name', 
                            'suppliers.phone','suppliers.email','suppliers.status','suppliers.image_path','companies.name','companies.id','companies.name','company_categories.title')
                        ->orderBy('suppliers.id','DESC');

        return Datatables::of($suppliers)
            ->add_column('next_payment_date', function($suppliers){
                return date(config('constant.DATE_FORMAT'), strtotime($suppliers->created_at));
            })

            ->filter(function ($query) use ($request) {
                if (@$request->search['value']) {

                    $query->where('suppliers.email', 'like', "%{$request->search['value']}%")
                    ->orWhere('companies.name', 'like', "%{$request->search['value']}%")
                    ->orWhere('company_categories.title', 'like', "%{$request->search['value']}%")
                    ->orWhere('suppliers.id', 'like', "%{$request->search['value']}%");
                }                
            })

            ->make(true);

mon js

$(function() {

  oTable = $('#supplier').DataTable({
        "processing": true,
        serverSide: true,
        "pageLength": 25,
        ordering: true,
        searching: true,
        "sDom":"tpr",
        "dom": 'difrtp',
        ajax: '{!! route('get-supplier') !!}',
        columns: [
            { data: 'name', name: 'name' },
            { data: 'email', name: 'email' },
            { data: 'title', name: 'title' },
            { data: 'created_at', name: 'created_at' },
            { data: 'status', name: 'first_name' },
            { data: 'next_payment_date', name: 'next_payment_date' },
            { data: 'action', name: 'action' }
        ]
    });
}