middleware issue

[sraiyani]

if i am adding middleware route function is not working

Route::group(['middleware' => ['prevent-back-history','auth']],function(){
Route::get('/role', ['middleware' => ['permission:role.view'],'uses'=>'Admin\RoleController@index']);
Route::get('/role/create', ['middleware' => ['permission:role.create'],'uses'=>'Admin\RoleController@create']);
Route::post('/role/store', ['middleware' => ['permission:role.create'],'uses'=>'Admin\RoleController@store']);
Route::get('/role/edit/{id}', ['middleware' => ['permission:role.edit'],'uses'=>'admin\RoleController@edit', 'as'=>'role-edit']);
Route::put('/role/edit/{id}', ['middleware' => ['permission:role.edit'],'uses'=>'admin\RoleController@update', 'as'=>'role-update']);
});

controller code

class RoleController extends Controller
{
public function __construct()
{
$this->middleware('auth');
}

public function index()
{
    $page_name = "Role";
    //$data = Permission::all();
    $data = Role::paginate(15);
    return view('admin.role.list',compact('data','page_name'));
}

}
getting this error whar is the issue Please suggest me