this post was submitted on 16 Jun 2026
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- I'm new to #Authentik - I've just spun up a test instance and tried to connect my first application (#Postiz) but I'm kind of stuck.

I've installed both Postiz and Authentik using Docker Compose - as provided by the relevant apps.

As far as #Authentik goes it looks like its approving authentication requests (its showing successes in the GUI) but the application just returns to the login screen without progressing.

One thing that I found was that within the configuration of the Application and Provider one URL provided by Authentik is the /application/o/postiz/.well-known/openid-configuration which lists several URLs used by the application - one is /application/o/authorize/ but unlike all the others this returns a 404 error when I try to load it via the browser.

I am struggling to work out if - this URL should 404 should occur and also how to diagnose what the problem is.

I've popped messages in their relevant Discord forums but any ideas or input would be greatly appreciated - I'm figuring getting Authentik is going to be key to getting other applications going.

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[โ€“] brewery@feddit.uk 3 points 1 month ago (1 children)

I have self hosted for years using Authentik and have 50 + services. Postiz has been one of the most challenging to spin up and maintain. The documentation is not up to date, the software is constantly changing and I had to tweak lots to get it to work. Even now, it seems to crash after a few days and haven't had the chance to investigate. All these posts I set up didn't go through and now if I turn it back on, it'll release them all in one go before I can get in to stop it, or have to revert to a fresh install...

The vast majority of services and not like this so don't get disheartened! Try some other ones first them come back to this when more experienced. I recommend Bento PDF, ConvertX, outline wiki, vikunja and immich (if you have the storage space).

At first, try to stick to software on Authentik's guides (https://integrations.goauthentik.io/). Once you do a few OIDC and forward proxy services you'll get the hang of it.

When I get a chance I'll share my docker compose SSO settings and authentik redirect uri that worked for me with the caveat that the software crashes for some reason.

@brewery Oh cheers. Yeah I think I need to test setting up another app to confirm whether its Authentik or Postiz. The other app I am looking at is an open source core banking system so I think I'll leave that one for a while and as you suggest try something more straight forward.

I'm keen to get Postiz working because I belong to a sailing club and its a time vacuum posting updates all over the place.

I'm interested do you you anything for social listening - I'd like to pull together a few social feeds from Twitter, Instal, Facebook and provide them to the few of us that are working on keeping the club's profile up.