# Cannot read property of undefined (reading 'map')

**URL:** <https://forum.codewithmosh.com/t/cannot-read-property-of-undefined-reading-map/9064>\
**Category:** React\
**Created:** [December 7, 2021, 5:55pm UTC](https://forum.codewithmosh.com/t/cannot-read-property-of-undefined-reading-map/9064 "2021-12-07T17:55:41Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Daiana](https://avatars.discourse-cdn.com/v4/letter/d/8dc957/32.png) [@Daiana](https://forum.codewithmosh.com/u/Daiana)\
**Post date:** [December 7, 2021, 5:55pm UTC](https://forum.codewithmosh.com/t/cannot-read-property-of-undefined-reading-map/9064/1 "2021-12-07T17:55:41Z")

</div>

Hi,  
I am now at “Sorting - Rendering Cell Content.” But I stack with this error. It’s been hours that I am trying to find the error( Please help

 ![Снимок экрана 2021-12-07 234947](https://us1.discourse-cdn.com/flex020/uploads/codewithmosh/original/2X/1/137f96932f8a5755ca779f781d09a3575bd974c8.png)  
 ![Снимок экрана 2021-12-07 235019](https://us1.discourse-cdn.com/flex020/uploads/codewithmosh/original/2X/a/a1e45046b79c69c271fd3d2fe023cd617fc1642d.png)  
 ![Снимок экрана 2021-12-07 235053](https://us1.discourse-cdn.com/flex020/uploads/codewithmosh/original/2X/5/53b3eeab28e71bfccf435c646093c6b010e76ea4.png)