Error Laravel 5.6, Symfony \ Component \ HttpKernel \ Exception \ MethodNotAllowedHttpException"

I have adjust controller name with route and send form that post method but it didnt work, i send it from modal

i have add but it still didnt work

This is from view :

<form action="" method="post">
                
                

                <div class="modal-header">
                    <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                        <i class="material-icons">clear</i>
                    </button>
                    <h5 class="modal-title">Edit Data</h5>
                </div>
                <div class="modal-body">
                    <div class="row">
                        <div class="col-sm-12">
                            <div class="form-group">
                                <label class="bmd-label-floating">Kode</label>
                                <input type="hidden" class="form-control" id="modalidkode">
                                <input type="text" class="form-control" id="modalkode" readonly>
                            </div>
                        </div>
                        <div class="col-sm-12">
                            <div class="form-group">
                                <label class="bmd-label-floating">Nama Kode</label>
                                <input type="text" class="form-control" id="modalnamakode" required>
                            </div>
                        </div>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-danger" data-dismiss="modal"
                            style="margin-right: 10px">Batal
                    </button>
                    <button type="submit" class="btn btn-info">Simpan Perubahan</button>
                </div>

Controller

public function editCode(Request $request){
    dd($request->all());
    $edCode="05.01";
    return redirect()->back()->withSuccess($edCode. " changed");
}

Route

Route::post('/pengaturan/edit', 'AllCodeController@editCode')->name('edit kode');

via Chebli Mohamed