# Error when switching locale: "topic doesn't exist" message appears on all topics

**URL:** https://meta.discourse.org/t/error-when-switching-locale-topic-doesnt-exist-message-appears-on-all-topics/400784
**Category:** Support
**Tags:** ai, dynaloc, bug
**Created:** [April 16, 2026, 11:57am UTC](https://meta.discourse.org/t/error-when-switching-locale-topic-doesnt-exist-message-appears-on-all-topics/400784 "2026-04-16T11:57:05Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![pmusaraj](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/pmusaraj/32/119489_2.png) [@pmusaraj](https://meta.discourse.org/u/pmusaraj)
#### Post date: [April 16, 2026, 2:28pm UTC](https://meta.discourse.org/t/error-when-switching-locale-topic-doesnt-exist-message-appears-on-all-topics/400784/4 "2026-04-16T14:28:04Z")

</div>

Do you see a `?preview_theme_id=ID` in the browser’s address bar at any point?

This error message is only shown if you’re previewing a theme with an incorrect ID. You likely did this at some point on this browser and that value “stuck” in the Chrome tab/window.

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_[View the full topic](https://meta.discourse.org/t/error-when-switching-locale-topic-doesnt-exist-message-appears-on-all-topics/400784)._