# 登录后可见主题的链接预览无法显示

**URL:** <https://meta.discourse.org/t/link-preview-not-working-for-topics-behind-login/108182>\
**Category:** Product Support\
**Created:** [2019 年2 月 2 日 03:03 UTC](https://meta.discourse.org/t/link-preview-not-working-for-topics-behind-login/108182 "2019-02-02T03:03:47Z")\
**Posts on this page:** 1\
**Showing post:** 1

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作者： ![MartyMeh](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/martymeh/32/113462_2.png) [@MartyMeh](https://meta.discourse.org/u/MartyMeh)\
发布日期： [2019 年2 月 2 日 03:03 UTC](https://meta.discourse.org/t/link-preview-not-working-for-topics-behind-login/108182/1 "2019-02-02T03:03:47Z")

</div>

I cannot get the link preview for other topics in my own forum to work sometimes, other times it works fine.

I have no problem when linking to external websites, and in some topics it seems to work fine, but others the preview just doesn’t appear. I’ve tried to write the url in a bunch of different ways, but no luck.

Not working here:  
[https://forum.cleanenergyreviews.info/t/wheres-the-ebook/180/2?u=marty](https://forum.cleanenergyreviews.info/t/wheres-the-ebook/180/2?u=marty)

Working here:

> **[Ch 1. Solar & Battery Guide by Photonik](https://forum.cleanenergyreviews.info/t/ch-1-solar-battery-guide-by-photonik/153)**
>
> Introduction Going solar can be hard. Confusing, overwhelming, and the information out there is often contradictory. That’s why we built Photonik | Solar Design why we started Clean Energy Reviews — and why we wrote this guide. Don’t worry, we...

hmm interesting, I’m just noticing that the top link has shown a preview in this post, but the bottom one hasn’t…

Is it something to do with the fact that within the bottom link there is a link preview? So you can’t get a link preview to a page that already has a link preview?

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_[View the full topic](https://meta.discourse.org/t/link-preview-not-working-for-topics-behind-login/108182)._