# TypeError: Cannot read property 'lookup' of undefined 오류가 많이 발생해요

**URL:** <https://meta.discourse.org/t/a-lot-of-typeerror-cannot-read-property-lookup-of-undefined/170856>\
**Category:** Product Support\
**Created:** [11월 21, 2020, 3:28오후 UTC](https://meta.discourse.org/t/a-lot-of-typeerror-cannot-read-property-lookup-of-undefined/170856 "2020-11-21T15:28:29Z")\
**Posts on this page:** 1\
**Showing post:** 1

<div class="post-metadata">

**Author:** ![MarcP](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/marcp/32/160184_2.png) [@MarcP](https://meta.discourse.org/u/MarcP)\
**Post date:** [11월 21, 2020, 3:28오후 UTC](https://meta.discourse.org/t/a-lot-of-typeerror-cannot-read-property-lookup-of-undefined/170856/1 "2020-11-21T15:28:29Z")

</div>

에러 로그에서 시간당 50건 이상의 오류가 보고되고 있지만, 프론트엔드에서는 아직 오류가 확인되지 않습니다.

대부분은 다음과 같은 경고입니다.

```
TypeError: Cannot read property 'lookup' of undefined
    at n (https://domain.com/assets/application-4411e2550c07883f35936e49782de79d71ca918a5b09c8c2f53d8f00aaf0e566.js:1:371830)
    at t.invoke (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:487826)
    at e.t.flush (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:486840)
    at e.t.flush (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:488839)
    at e.t._end (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:494214)
    at e.t.end (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:490785)
    at e.t._run (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:494732)
    at e.t._join (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:494517)
    at e.t.join (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:491493)
    at c (https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:358691)

```

자주 발생하는 또 다른 경고는 다음과 같습니다:

```
n@https://domain.com/assets/application-4411e2550c07883f35936e49782de79d71ca918a5b09c8c2f53d8f00aaf0e566.js:1:371825
d</t.invoke@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:487826
d</t.flush@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:486840
m</t.flush@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:488839
t</t._end@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:494214
t</t.end@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:490785
t</t._run@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:494732
t</t.run@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:491393
u@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:358611
s/r.success@https://domain.com/assets/application-4411e2550c07883f35936e49782de79d71ca918a5b09c8c2f53d8f00aaf0e566.js:1:204857
i@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:28213
fireWith@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:28981
w@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:79516
o/<@https://domain.com/assets/ember_jquery-189e46ebcb33594b835e782fd1ce916ec750bc0cf980ebc4fb7796649161a18d.js:1:81961

```

이것을 본 적이 있는 분이 계신가요? 이는 우려할 만한 문제인가요?

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