# Sidebar activation issues after recent Doc Categories update

**URL:** <https://meta.discourse.org/t/sidebar-activation-issues-after-recent-doc-categories-update/383888>\
**Category:** Bug\
**Tags:** doc-categories, horizon-theme, bug\
**Created:** [September 24, 2025, 2:03pm UTC](https://meta.discourse.org/t/sidebar-activation-issues-after-recent-doc-categories-update/383888 "2025-09-24T14:03:18Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![MachineScholar](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/machinescholar/32/424719_2.png) [@MachineScholar](https://meta.discourse.org/u/MachineScholar)\
**Post date:** [September 25, 2025, 11:20am UTC](https://meta.discourse.org/t/sidebar-activation-issues-after-recent-doc-categories-update/383888/5 "2025-09-25T11:20:40Z")

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Thanks for the quick reply! It seems not to be the cache as the issue is persisting. I’m sending you a PM with the [Data Explorer](https://meta.discourse.org/t/32566?silent=true) query results and the `bundle exec rake doc_categories:build_sidebar` output. It aborts with a fatal

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_[View the full topic](https://meta.discourse.org/t/sidebar-activation-issues-after-recent-doc-categories-update/383888)._