Trying to get property 'id' of non-object

Guys can anyone help with this error. I'm using Spartie Permission.

            <select multiple name="roles[]">

                  <option value="" disabled>Assign Role</option>

                @foreach ($roles as $role )
                      <option value="{{$role->id}}" >{{($role->name)}}</option>
                @endforeach

            </select>


          </div>