Trying to Implement Experience GUI extensions for Experience Space using below documentation: https://docs.rws.com/1099765/1068407/tridion-sites-10-main-documentation/gui-extensions-for-experience-space


while running project locally i get below error on browser:

Error occurred while trying to proxy: localhost:3000/ui/

In Terminal logs i see : e> [webpack-dev-server] [HPM] Error occurred while proxying request localhost:3000/ui/ to https://development.tridion.sdlproducts.com/ [ECONNRESET] (https://nodejs.org/api/errors.html#errors_common_system_errors)

Using rws sites as saas and using SDLCXC credentials for logins.

NOTE: if i try to proxy other sites like facebook or google instead of cme, they work!

I tried multiple things by tweaking devServer.js if saas need more changes but was not able to run it locally.

  • Rahul , We will review and update you , also i would suggest you create a support ticket and may be will be able to share some more details on how to make it work
    – Anand N S
    Oct 25, 2023 at 8:00
  • Rahul, I assume you are using access management please confirm
    – Anand N S
    Oct 25, 2023 at 15:32
  • @AnandNS yes! we are using access management Oct 26, 2023 at 7:10
  • I get this error message on access management screen : An error occurred. Invalid redirect_uri Check the logs for more information. Oct 26, 2023 at 21:36

1 Answer 1


Can you please try the following from your local and let me know if its working

Step 1) access the access management URL , go to Applications -> double click Tridion Sites Experience Space

Step 2) Click on Edit and Add the following URL

  • http://localhost:3000/ui/signin-oidc
  • http://domainname:3000/ui/signin-oidc ( domainname of the CMS )

Step 3) Restart the Access Management Apppool

Step 4) install visual studio code on the CMS server go to the extension example : \simple-action-addon\hello-action open the package.json add http://domainname to the target ( CMS domain URL)

Step 6) run ( npm i ) and run npm run dev , it will load the http://localhost:3000/ui/ with the extensions displayed successfully.

Hope it works for you !!

  • it works like a charm. Thanks Oct 27, 2023 at 11:27
  • Thanks Rahul for the confirmation , please reach out to tridion stackexchange if you have any further questions related to extensions and anything else we are happy to address your questions
    – Anand N S
    Oct 27, 2023 at 11:40

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