# Phaser-arcade-physics.min.js:1 Uncaught TypeError: Cannot read property 'isParent' of undefined

**URL:** <https://phaser.discourse.group/t/phaser-arcade-physics-min-js-1-uncaught-typeerror-cannot-read-property-isparent-of-undefined/6127>\
**Category:** Phaser 3\
**Created:** [April 29, 2020, 8:18am UTC](https://phaser.discourse.group/t/phaser-arcade-physics-min-js-1-uncaught-typeerror-cannot-read-property-isparent-of-undefined/6127 "2020-04-29T08:18:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Hidden\_R3d](https://yyz2.discourse-cdn.com/free1/user_avatar/phaser.discourse.group/hidden_r3d/32/3275_2.png) [@Hidden\_R3d](https://phaser.discourse.group/u/Hidden_R3d)\
**Post date:** [April 29, 2020, 8:18am UTC](https://phaser.discourse.group/t/phaser-arcade-physics-min-js-1-uncaught-typeerror-cannot-read-property-isparent-of-undefined/6127/1 "2020-04-29T08:18:24Z")

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I was following the tutorial for make your first game and I mostly did everything the same, but I changed a couple things, and on part 10 I managed to break the game. Can somebody explain why it doesn’t work?

Working game: [https://drive.google.com/file/d/1gYpruPUyIcZ0FelJWYwEyQ6CpEYaEDVh/view?usp=sharing](https://drive.google.com/file/d/1gYpruPUyIcZ0FelJWYwEyQ6CpEYaEDVh/view?usp=sharing)

Broken Version: [https://drive.google.com/file/d/1uq4bykbperSfrBrn0Rnolppk-302XZN6/view?usp=sharing](https://drive.google.com/file/d/1uq4bykbperSfrBrn0Rnolppk-302XZN6/view?usp=sharing)