Cannot read property '@' of undefined

[Harris-Aaron]

I have some javascript code that gives this error

modules.js?hash=749a121…:60852TypeError: Cannot read property '@' of undefined

modules.js?hash=749a121…:60852TypeError: Cannot read property '@' of undefined
    at updateView (http://localhost:3000/packages/modules.js?hash=749a1216b1191e5dda1e8ad0945d43d86fd6b7f0:44855:69)
    at Object.<anonymous> (http://localhost:3000/packages/modules.js?hash=749a1216b1191e5dda1e8ad0945d43d86fd6b7f0:44850:9)
    at http://localhost:3000/packages/modules.js?hash=749a1216b1191e5dda1e8ad0945d43d86fd6b7f0:48179:18
    at invokeLinkFn (http://localhost:3000/packages/modules.js?hash=749a1216b1191e5dda1e8ad0945d43d86fd6b7f0:56866:9)
    at nodeLinkFn (http://localhost:3000/packages/modules.js?hash=749a1216b1191e5dda1e8ad0945d43d86fd6b7f0:56267:11)
    at compositeLinkFn (http://localhost:3000/packages/modules.js?hash=749a1216b1191e5dda1e8ad0945d43d86fd6b7f0:55552:13)
    at compositeLinkFn (http://localhost:3000/packages/modules.js?hash=749a1216b1191e5dda1e8ad0945d43d86fd6b7f0:55555:13)
    at compositeLinkFn (http://localhost:3000/packages/modules.js?hash=749a1216b1191e5dda1e8ad0945d43d86fd6b7f0:55555:13)
    at compositeLinkFn (http://localhost:3000/packages/modules.js?hash=749a1216b1191e5dda1e8ad0945d43d86fd6b7f0:55555:13)
    at publicLinkFn (http://localhost:3000/packages/modules.js?hash=749a1216b1191e5dda1e8ad0945d43d86fd6b7f0:55432:30) <ion-nav-view class="view-container" nav-view-transition="ios">

What does this error mean? How to deal with？

[Harris-Aaron]

Great. I found a way for the error. it's these packages has Compatibility issues. we need run rm -rf node_modules save package.json file, next run meteor run
ok, now we open the url localhost:3000 on chrome my learning meteor first step 🎆 🎆 🎆

[DAB0mB]

Thank you @Harris-Aaron for the conclusions :-)