# My forum goes down when I do launcher rebuild app

**URL:** <https://meta.discourse.org/t/my-forum-goes-down-when-i-do-launcher-rebuild-app/242671>\
**Category:** Self-hosting\
**Created:** [October 22, 2022, 2:50pm UTC](https://meta.discourse.org/t/my-forum-goes-down-when-i-do-launcher-rebuild-app/242671 "2022-10-22T14:50:40Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Jagster](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/jagster/32/192154_2.png) [@Jagster](https://meta.discourse.org/u/Jagster)\
**Post date:** [October 22, 2022, 7:02pm UTC](https://meta.discourse.org/t/my-forum-goes-down-when-i-do-launcher-rebuild-app/242671/3 "2022-10-22T19:02:36Z")

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Well, `nano -l` is much easier way to find right line and fix it right away 😉

If you haven’t change too much app.yml line 9 is just before `templates:` — can there be something strange as extra whitespace?

But one thing I’ve learned about YAML is there can be a whitespace almost anywhere, missing space, missing quote or wrong type - and error is pointing to wrong place.

I would say it is easier delete app.yml and do setup again.

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