I get this compilation error trying to use piston sprite

rust spr

/**
src/main.rs:42:2: 51:6 note: expansion site
src/main.rs:47:19: 47:39 help: run `rustc --explain E0277` to see a detailed explanation
src/main.rs:47:19: 47:39 error: the trait `graphics::graphics::Graphics` is not implemented for the type `gfx_graphics::back_end::GfxGraphics<'_, gfx_device_gl::Resources, gfx::device::command::CommandBuffer<gfx_device_gl::Resources>, gfx_device_gl::factory::Output>` [E0277]
src/main.rs:47             scene.draw(c.transform, g);
                                 ^~~~~~~~~~~~~~~~~~~~
**/




extern crate piston_window;
extern crate sprite;
extern crate find_folder;

use piston_window::*;
use sprite::*;
use std::rc::Rc;

#[allow(dead_code)]
fn main() {
	
	//define the window size
	let (width, height) = (800, 600);
    
    //set the open gl spec level
    let opengl = OpenGL::V3_2;
    
    //create the window
    let window: PistonWindow =
        WindowSettings::new("piston: sprite", (width, height))
        .exit_on_esc(true)
        .opengl(opengl)
        .build()
        .unwrap();
	
	//find the assets folder
	let assets = find_folder::Search::ParentsThenKids(3, 3)
        .for_folder("assets").unwrap();
        
    let mut scene = Scene::new();
    let tex = Rc::new(Texture::from_path(
            &mut *window.factory.borrow_mut(),
            assets.join("dude.png"),
            Flip::None,
            &TextureSettings::new()
        ).unwrap());
    let mut sprite = Sprite::from_texture(tex.clone());
    sprite.set_position(width as f64 / 2.0, height as f64 / 2.0);

    let id = scene.add_child(sprite);
    
	for e in window {
    	scene.event(&e);
    	
    	 e.draw_2d(|c, g| {
            clear([1.0, 1.0, 1.0, 1.0], g);
            scene.draw(c.transform, g);
        });

   
    }
      

}