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**Category:** Haxe\
**Created:** [September 21, 2021, 1:40am UTC](https://community.haxe.org/t/help-with-html5-porting/3257 "2021-09-21T01:40:39Z")\
**Posts on this page:** 4\
**Page:** 1
**Author:**  [@carsonastro](https://community.haxe.org/u/carsonastro)\
**Post date:** [September 21, 2021, 1:40am UTC](https://community.haxe.org/t/help-with-html5-porting/3257/1 "2021-09-21T01:40:39Z")
When porting a friday night funkin mod to html5, the game opens but freezes after loading. I get this error in the console:
Kade Engine.js:127221 Uncaught TypeError: Cannot read properties of null (reading ‘set\_x’)
at TitleState.update (Kade Engine.js:28382)
at TitleState.tryUpdate (Kade Engine.js:9047)
at flixel\_FlxGame.update (Kade Engine.js:35074)
at flixel\_FlxGame.step (Kade Engine.js:35049)
at flixel\_FlxGame.onEnterFrame (Kade Engine.js:34983)
at openfl\_display\_Stage.\_\_dispatchEvent (Kade Engine.js:4938)
at openfl\_display\_Stage._dispatch (Kade Engine.js:5751)
at openfl\_display\_Stage.broadcastEvent (Kade Engine.js:127040)
at openfl\_display\_Stage.**onLimeRender (Kade Engine.js:128067)
at lime\_app**$Event$lime$graphics$RenderContext_$Void.dispatch (Kade Engine.js:104375)
Any ideas how i could fix this? Here is the source code for the mod: [https://github.com/Clowfoe/ImpostorWeek2](https://github.com/Clowfoe/ImpostorWeek2)
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**Author:**  [@nanjizal](https://community.haxe.org/u/nanjizal)\
**Post date:** [September 21, 2021, 5:52pm UTC](https://community.haxe.org/t/help-with-html5-porting/3257/2 "2021-09-21T17:52:25Z")
> [@carsonastro](#):
>
> Kade Engine.js:127221 Uncaught TypeError: Cannot read properties of null (reading ‘set\_x’)
Can you get mapping to work so you can find out the error line in the haxe code. I think you need to find which haxe class, line number is failing then someone will likely take a quick look… otherwise probably not.
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**Author:**  [@nanjizal](https://community.haxe.org/u/nanjizal)\
**Post date:** [September 21, 2021, 5:53pm UTC](https://community.haxe.org/t/help-with-html5-porting/3257/3 "2021-09-21T17:53:26Z")
work out all the related haxe line numbers and you will be lot closer to a fix
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**Author:**  [@nanjizal](https://community.haxe.org/u/nanjizal)\
**Post date:** [September 21, 2021, 5:55pm UTC](https://community.haxe.org/t/help-with-html5-porting/3257/4 "2021-09-21T17:55:36Z")
not sure if source mapping will help but anyway you can get the line numbers in haxe code will make it more likely someone will assist.
> **[Source Maps - Haxe - The Cross-platform Toolkit](https://haxe.org/manual/debugging-source-map.html)**
>
> Haxe is an open source toolkit based on a modern, high level, strictly typed programming language.