# Trying to up extension rig

**URL:** <https://discuss.dev.twitch.com/t/trying-to-up-extension-rig/17517>\
**Category:** Extensions\
**Created:** [September 4, 2018, 4:45am UTC](https://discuss.dev.twitch.com/t/trying-to-up-extension-rig/17517 "2018-09-04T04:45:02Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jabusir](https://d3ovvz0v2ajtpu.cloudfront.net/user_avatar/discuss.dev.twitch.com/jabusir/32/11074_2.png) [@jabusir](https://discuss.dev.twitch.com/u/jabusir)\
**Post date:** [September 4, 2018, 4:45am UTC](https://discuss.dev.twitch.com/t/trying-to-up-extension-rig/17517/1 "2018-09-04T04:45:02Z")

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I have a web app that I would really like to turn into an extension, but I’m getting errors as I’m setting up the environment for the developer rig. Can anyone help me figure this out?

 ![image](https://d2opxh93rbxzdn.cloudfront.net/original/2X/4/4258033c3a0c619180331ec055889f22206445af.png)

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**Author:** ![BarryCarlyon](https://d3ovvz0v2ajtpu.cloudfront.net/user_avatar/discuss.dev.twitch.com/barrycarlyon/32/253_2.png) [@BarryCarlyon](https://discuss.dev.twitch.com/u/BarryCarlyon)\
**Post date:** [September 4, 2018, 8:42am UTC](https://discuss.dev.twitch.com/t/trying-to-up-extension-rig/17517/2 "2018-09-04T08:42:35Z")

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Did you add `localhost.rig.twitch.tv` to your hosts file with the address of `127.0.0.1` also `npm start` is not the correct way to start the rig. You provided no config file/arguments. (Hence `clientId: undefined` etc)

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**Author:** ![arnaudmanaranche](https://d3ovvz0v2ajtpu.cloudfront.net/user_avatar/discuss.dev.twitch.com/arnaudmanaranche/32/4343_2.png) [@arnaudmanaranche](https://discuss.dev.twitch.com/u/arnaudmanaranche)\
**Post date:** [September 5, 2018, 7:07am UTC](https://discuss.dev.twitch.com/t/trying-to-up-extension-rig/17517/3 "2018-09-05T07:07:29Z")

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Hi @jabusir,

As displayed on your screenshot, no clientId, version, owner and secret are defined. Check this link to start correctly the developer rig environment :  
[https://github.com/twitchdev/developer-rig#starting-the-developer-rig-in-online-mode](https://github.com/twitchdev/developer-rig#starting-the-developer-rig-in-online-mode)