TypeError: Cannot read property 'lookup' of undefined express code example

Example: Cannot read property 'look up Property' of undefined

TypeError: Cannot read property 'lookupProperty' of undefined
  
  - lookup.js:11 Object.eval
    [..]/[handlebars]/dist/cjs/handlebars/helpers/lookup.js:11:20
  
  - wrapHelper.js:15 Object.wrapper
    [..]/[handlebars]/dist/cjs/handlebars/internal/wrapHelper.js:15:19
  
  - idex.hbs:25 2
    [..]/[html-webpack-plugin]/lib/loader.js!./pages/idex.hbs:25:1150
  
  - runtime.js:268 prog
    [..]/[handlebars]/dist/cjs/handlebars/runtime.js:268:12
  
  - with.js:32 Object.eval
    [..]/[handlebars]/dist/cjs/handlebars/helpers/with.js:32:14
  
  - wrapHelper.js:15 Object.wrapper
    [..]/[handlebars]/dist/cjs/handlebars/internal/wrapHelper.js:15:19
  
  - idex.hbs:11 1
    [..]/[html-webpack-plugin]/lib/loader.js!./pages/idex.hbs:11:52
  
  - runtime.js:268 prog
    [..]/[handlebars]/dist/cjs/handlebars/runtime.js:268:12
  
  - runtime.js:319 partialBlockWrapper
    [..]/[handlebars]/dist/cjs/handlebars/runtime.js:319:16
  
  - runtime.js:334 Object.invokePartial
    [..]/[handlebars]/dist/cjs/handlebars/runtime.js:334:12