# ELEM UNDEF error occurred when adding a component instance to multiple pages

**URL:** <https://community.weweb.io/t/elem-undef-error-occurred-when-adding-a-component-instance-to-multiple-pages/9589>\
**Category:** Developer corner\
**Tags:** bug\
**Created:** [July 8, 2024, 7:37am UTC](https://community.weweb.io/t/elem-undef-error-occurred-when-adding-a-component-instance-to-multiple-pages/9589 "2024-07-08T07:37:29Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ahmad2345](https://avatars.discourse-cdn.com/v4/letter/a/54ee81/32.png) [@ahmad2345](https://community.weweb.io/u/ahmad2345)\
**Post date:** [July 8, 2024, 7:37am UTC](https://community.weweb.io/t/elem-undef-error-occurred-when-adding-a-component-instance-to-multiple-pages/9589/1 "2024-07-08T07:37:29Z")

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i came across this issue where my elements become undefined, can some one please help.  
https://www.loom.com/embed/27ca0a280f3d4c89a22be6d1f77ae4f4?sid=358107b4-3c15-4c95-b095-6d11f676013b

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<div class="post-metadata">

**Author:** ![luka](https://sea2.discourse-cdn.com/flex016/user_avatar/community.weweb.io/luka/32/1571_2.png) [@luka](https://community.weweb.io/u/luka)\
**Post date:** [July 8, 2024, 8:41am UTC](https://community.weweb.io/t/elem-undef-error-occurred-when-adding-a-component-instance-to-multiple-pages/9589/2 "2024-07-08T08:41:14Z")

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Report the bug on [support.weweb.io](http://support.weweb.io)