Hello!
From what I see on your forum, it seems there is an issue with the Patreon plugin:
Specifically here:
https://github.com/discourse/discourse-patreon/blob/main/assets/javascripts/discourse/connectors/topic-above-footer-buttons/patreon.js#L20C9-L20C17
I believe $.cookie usage has been deprecated and dropped from Discourse, and since Ember 5 is enabled, it errors directly. I don’t have an immediate solution for you; the plugin needs to fix this.
$.cookie
EDIT: Made a PR:
