I am trying to use the development server shipped with UI Exensions react app, when running the server and open https://localhost:3000/ui in the browser I got HTTP Error 404. The requested resource is not found.

I added https://localhost:3000/ui/signin-oidc to allowed redirects url for Tridion Sites Experience Space in Access Management, I've also added http://domainname:3000/ui/signin-oidc ( domainname of the CMS ) based on the accepted answer here GUI extensions for Experience Space - Not working on Local

Are there more required config to make this work?


1 Answer 1


We've recently updated documentation for extension examples. It now includes steps for https environments. Can you check it and see if it helps?


In general, if you see 404, it means you are reaching wrong environment.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.