is there anyone the solution doesn't work?

I was very confused that why my code doesn't work and finally I'm checking the solution but my code is just the same as he wrote. is there anyone like me? there is error message on localhost:3000

/Users/beganachoi/Documents/code/tech-degree-6/practice/views/index.pug:8 6| 7| //- 1. Use Pug's each iterator to render recipe markup for each recipe object > 8| each recipe in recipes 9| //- 2. Render the href attribute using the recipe ID. For example: '/recipes/1' 10| a(href=/recipes/${recipe.id}) 11| //- 3. Dynamically display the recipe name Cannot read property 'length' of undefined TypeError: /Users/beganachoi/Documents/code/tech-degree-6/practice/views/index.pug:8 6| 7| //- 1. Use Pug's each iterator to render recipe markup for each recipe object

8| each recipe in recipes 9| //- 2. Render the href attribute using the recipe ID. For example: '/recipes/1' 10| a(href=/recipes/${recipe.id}) 11| //- 3. Dynamically display the recipe name

Cannot read property 'length' of undefined at eval (eval at wrap (/Users/beganachoi/Documents/code/tech-degree-6/practice/node_modules/pug-runtime/wrap.js:6:10), <anonymous>:26:32) at eval (eval at wrap (/Users/beganachoi/Documents/code/tech-degree-6/practice/node_modules/pug-runtime/wrap.js:6:10), <anonymous>:53:4) at template (eval at wrap (/Users/beganachoi/Documents/code/tech-degree-6/practice/node_modules/pug-runtime/wrap.js:6:10), <anonymous>:55:72) at Object.exports.renderFile (/Users/beganachoi/Documents/code/tech-degree-6/practice/node_modules/pug/lib/index.js:427:38) at Object.exports.renderFile (/Users/beganachoi/Documents/code/tech-degree-6/practice/node_modules/pug/lib/index.js:417:21) at View.exports.__express as engine at View.render (/Users/beganachoi/Documents/code/tech-degree-6/practice/node_modules/express/lib/view.js:135:8) at tryRender (/Users/beganachoi/Documents/code/tech-degree-6/practice/node_modules/express/lib/application.js:640:10) at Function.render (/Users/beganachoi/Documents/code/tech-degree-6/practice/node_modules/express/lib/application.js:592:3) at ServerResponse.render (/Users/beganachoi/Documents/code/tech-degree-6/practice/node_modules/express/lib/response.js:1008:7)