bucle, matriz javascript

NotFoundError: Not Found
    at C:\Users\smith\OneDrive\Desktop\web\app.js:36:8
    at Layer.handle [as handle_request] (C:\Users\smith\OneDrive\Desktop\web\node_modules\express\lib\router\layer.js:95:5)
    at trim_prefix (C:\Users\smith\OneDrive\Desktop\web\node_modules\express\lib\router\index.js:317:13)
    at C:\Users\smith\OneDrive\Desktop\web\node_modules\express\lib\router\index.js:284:7
    at Function.process_params (C:\Users\smith\OneDrive\Desktop\web\node_modules\express\lib\router\index.js:335:12)
    at next (C:\Users\smith\OneDrive\Desktop\web\node_modules\express\lib\router\index.js:275:10)
    at C:\Users\smith\OneDrive\Desktop\web\node_modules\express\lib\router\index.js:635:15
    at next (C:\Users\smith\OneDrive\Desktop\web\node_modules\express\lib\router\index.js:260:14)
    at Function.handle (C:\Users\smith\OneDrive\Desktop\web\node_modules\express\lib\router\index.js:174:3)
    at router (C:\Users\smith\OneDrive\Desktop\web\node_modules\express\lib\router\index.js:47:12)
Enchanting Elk