# All plugins not functioning due to CORS error after recent upgrade

**URL:** https://meta.discourse.org/t/all-plugins-not-functioning-due-to-cors-error-after-recent-upgrade/399466
**Category:** Self-hosting
**Tags:** cdn
**Created:** [March 27, 2026, 8:35pm UTC](https://meta.discourse.org/t/all-plugins-not-functioning-due-to-cors-error-after-recent-upgrade/399466 "2026-03-27T20:35:59Z")
**Posts on this page:** 1
**Showing post:** 19

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### Author: ![david](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/david/32/157490_2.png) [@david](https://meta.discourse.org/u/david)
#### Post date: [April 8, 2026, 8:37am UTC](https://meta.discourse.org/t/all-plugins-not-functioning-due-to-cors-error-after-recent-upgrade/399466/19 "2026-04-08T08:37:14Z")

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I assume `f.insertcred.it` is your S3 CDN? HighlightJS should be loaded from the ‘application CDN’, not the S3 CDN, so this is a surprising issue. As far as I know, nothing related to highlightjs has changed over the last few months.

Do you have an app CDN? Or just S3 + S3 CDN?

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