# Beta 6 showing header errors

**URL:** <https://meta.discourse.org/t/beta-6-showing-header-errors/202481>\
**Category:** Bug\
**Created:** [September 2, 2021, 7:10pm UTC](https://meta.discourse.org/t/beta-6-showing-header-errors/202481 "2021-09-02T19:10:09Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Amicable](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/amicable/32/68902_2.png) [@Amicable](https://meta.discourse.org/u/Amicable)\
**Post date:** [September 4, 2021, 12:57pm UTC](https://meta.discourse.org/t/beta-6-showing-header-errors/202481/5 "2021-09-04T12:57:01Z")

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You will need to rebuild via the command line. I don’t know why this caching issue exists. I have a default implementation with very little customisation. My guess is something historically has broken the ability to clear caches containing CSS when upgrading via the UI.

Last time this happened, I didn’t rebuild via the command line and the issue cleared up on a subsequent upgrade some weeks later.

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