# Onderwerpen worden niet weergegeven in de rechterzijbalk

**URL:** https://meta.discourse.org/t/topics-not-rending-in-right-sidebar/377636
**Category:** Bug
**Tags:** right-sidebar-blocks
**Created:** [6 augustus 2025 om 22:38 UTC](https://meta.discourse.org/t/topics-not-rending-in-right-sidebar/377636 "2025-08-06T22:38:53Z")
**Posts on this page:** 1
**Showing post:** 1

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### Author: ![pfaffman](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/pfaffman/32/120154_2.png) [@pfaffman](https://meta.discourse.org/u/pfaffman)
#### Post date: [6 augustus 2025 om 22:38 UTC](https://meta.discourse.org/t/topics-not-rending-in-right-sidebar/377636/1 "2025-08-06T22:38:53Z")

</div>

I have a right sidebar category panel that has stopped displaying. It looks like something is wrong with what’s getting rendered:

 ![image](https://global.discourse-cdn.com/meta/original/4X/4/8/7/487598debee757491f8c9cba7ee46519a051368f.png)

You can see in the image that the URLs look like `href=“/t/undefined/15099”` (the topic slug is undefined, and the stuff that should be between the `<a href>RIGHT HERE</a>` is missing.

The stuff is coming from [https://www.eclipsejetpilots.org/c/fly-in-conventions/upcoming-events/86](https://www.eclipsejetpilots.org/c/fly-in-conventions/upcoming-events/86) (login required, hosted by CDCK). The stuff in `https://www.eclipsejetpilots.org/t/general-information-ejopa-2026-convention/14845.json` looks right, but somehow that info isn’t getting to the sidebar.

~~It may have to do with having a sub-sub category in that sub-category. It seems like moving [https://www.eclipsejetpilots.org/t/past-eclipse-fly-in-europe-july-4-2025/9441](https://www.eclipsejetpilots.org/t/past-eclipse-fly-in-europe-july-4-2025/9441) into the category instead of a sub-sub category fixes it.~~

But, only for a few minutes.

It seems like it works for a while and then something comes and caches something and then it stops working. Several times I’ve changed something and it’s seemed like that was the fix and a few minutes later the sidebar items disappeared again.

EDIT: I’m moving this to #Contribute > Bug since it seems clear that the stuff in those `href`s is not supposed to be undefined.

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_[View the full topic](https://meta.discourse.org/t/topics-not-rending-in-right-sidebar/377636)._