# Forum is down (Error: invalid CSS)

**URL:** <https://meta.discourse.org/t/forum-is-down-error-invalid-css/76414>\
**Category:** Product Support\
**Created:** [2017 年 12 月 19 日午前 10:49 UTC](https://meta.discourse.org/t/forum-is-down-error-invalid-css/76414 "2017-12-19T10:49:33Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![nixie](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/nixie/32/82174_2.png) [@nixie](https://meta.discourse.org/u/nixie)\
**Post date:** [2017 年 12 月 19 日午前 10:55 UTC](https://meta.discourse.org/t/forum-is-down-error-invalid-css/76414/3 "2017-12-19T10:55:22Z")

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Looks like a very minor error in the CSS customisation.  
Did you recently do any changes to CSS?

Also - how old is the recent working backup?

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_[View the full topic](https://meta.discourse.org/t/forum-is-down-error-invalid-css/76414)._