# Playground breaks when changing Babylon version

**URL:** <https://forum.babylonjs.com/t/playground-breaks-when-changing-babylon-version/5241>\
**Category:** Bugs\
**Created:** [August 23, 2019, 11:24am UTC](https://forum.babylonjs.com/t/playground-breaks-when-changing-babylon-version/5241 "2019-08-23T11:24:35Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![CLB\_ZReality](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/clb_zreality/32/4293_2.png) [@CLB\_ZReality](https://forum.babylonjs.com/u/CLB_ZReality)\
**Post date:** [August 23, 2019, 11:24am UTC](https://forum.babylonjs.com/t/playground-breaks-when-changing-babylon-version/5241/1 "2019-08-23T11:24:35Z")

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Hey,

we’ve encountered a problem in the playground. When you try to change the Babylon version it shows the loading icon for unlimited time.

In the debug console of the browser (chrome) it shows:  
Uncaught TypeError: this.parent.main.compileAndRun is not a function  
at SettingsPG. (settingsPG.js:166)

Even if you try to change from “latest” to “latest” it crashes.

Best regards.

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**Author:** ![JohnK](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/johnk/32/26764_2.png) [@JohnK](https://forum.babylonjs.com/u/JohnK)\
**Post date:** [August 23, 2019, 12:24pm UTC](https://forum.babylonjs.com/t/playground-breaks-when-changing-babylon-version/5241/2 "2019-08-23T12:24:05Z")

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Have replicated this problem and opened a issue on github. Thank you for pointing it out.

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<div class="post-metadata">

**Author:** ![CLB\_ZReality](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/clb_zreality/32/4293_2.png) [@CLB\_ZReality](https://forum.babylonjs.com/u/CLB_ZReality)\
**Post date:** [August 23, 2019, 12:31pm UTC](https://forum.babylonjs.com/t/playground-breaks-when-changing-babylon-version/5241/3 "2019-08-23T12:31:38Z")

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No problem 🙂 thanks for helping out.

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**Author:** ![Deltakosh](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/deltakosh/32/26635_2.png) [@Deltakosh](https://forum.babylonjs.com/u/Deltakosh)\
**Post date:** [August 23, 2019, 6:07pm UTC](https://forum.babylonjs.com/t/playground-breaks-when-changing-babylon-version/5241/4 "2019-08-23T18:07:55Z")

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Should be good now! Thanks guys