# 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:** 2

<div class="post-metadata">

**Author:** ![j127](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/j127/32/79093_2.png) [@j127](https://meta.discourse.org/u/j127)\
**Post date:** [October 22, 2022, 6:19pm UTC](https://meta.discourse.org/t/my-forum-goes-down-when-i-do-launcher-rebuild-app/242671/2 "2022-10-22T18:19:31Z")

</div>

If I’m understanding correctly, the error message says that there is a problem on line 9.

Try typing this command:

```plaintext
cat -n containers/app.yml

```

That will print out the contents of the file with line numbers, and you can check line 9 for syntax errors.

It would probably be a good idea to run that `chmod` command mentioned in the output too, though it isn’t related to the error.

---

_[View the full topic](https://meta.discourse.org/t/my-forum-goes-down-when-i-do-launcher-rebuild-app/242671)._