# My extension sometimes doesn't work on Dev Rig

**URL:** <https://staging-discuss.dev.twitch.com/t/my-extension-sometimes-doesnt-work-on-dev-rig/19199>\
**Category:** Extensions\
**Created:** [December 24, 2018, 10:26am UTC](https://staging-discuss.dev.twitch.com/t/my-extension-sometimes-doesnt-work-on-dev-rig/19199 "2018-12-24T10:26:06Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![BarryCarlyon](https://d1d6mrmdu7ztse.cloudfront.net/user_avatar/staging-discuss.dev.twitch.com/barrycarlyon/32/253_2.png) [@BarryCarlyon](https://staging-discuss.dev.twitch.com/u/BarryCarlyon)\
**Post date:** [December 24, 2018, 8:40pm UTC](https://staging-discuss.dev.twitch.com/t/my-extension-sometimes-doesnt-work-on-dev-rig/19199/4 "2018-12-24T20:40:31Z")

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Then you need to check the chrome inspector for errors.

It sounds like you may have packaged your files incorrectly, and you are getting a 404

You need to package the files in your folder, not the folder itself

See

> [@\[SOLVED\] 404, The specified key does not exist](https://staging-discuss.dev.twitch.com/t/solved-404-the-specified-key-does-not-exist/11921):
>
> So I have been working on a panel extension for my stream and I got past the local testing, everything was working fine. I uploaded the files in a .zip to Twitch. I followed all the guides, made sure to include the extension helper JS file, but I am getting a 404 error when it tries to load the extension files form the Twitch CDN. I have tried created a new extension and uploaded the example project that Twitch has in the documentation to see if the issue would still happened and it did. I’m no…

In addition, make sure you are using relative URL’s to your assets/js/css

> [@\[SOLVED\] Getting 404 for hosted config.html asset](https://staging-discuss.dev.twitch.com/t/solved-getting-404-for-hosted-config-html-asset/18302/9):
>
> You need to use relative urls (not absolute) to load your css and js As your zip is uploaded to a sub folder of the extensions domain. (Something like extensionsdomain.twitch.tv/extensionversion/yourfiles)

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