Similar to this issue Can't setup Discourse ID: Application with this redirect URI already exists My self-hosted Discourse has this exact error. But the thread above was already closed and didn’t see the answer on how to fix, but happy that issue was resolved. Is it possible to help my forum as wel…

This should be resolved via PM now. The original issue was that this instance was registered a while ago, the server has issues, so the site manager had to reinstall Discourse and the credentials didn’t carry over.

Can't setup Discourse ID: redirect URI already exists

Ondersteuning

pmusaraj (Penar Musaraj) 15 februari 2026 om 18:16 2

Please share the URL via PM, thanks.

Topic		Antwoorden	Weergaven
Can't set up Discourse ID: Application with this redirect URI already exists Self-hosting discourse-id	2	36	9 maart 2026
Can't setup Discourse ID: Application with this redirect URI already exists Support discourse-id	4	107	18 november 2025
The Discourse ID cannot be used after changing the forum domain Support discourse-id	3	105	25 februari 2026
How Discourse ID works Site Management discourse-id	22	1830	24 januari 2026
Changing domain names prevents Discourse ID from working Support discourse-id	3	178	19 oktober 2025

Can't setup Discourse ID: redirect URI already exists

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