Synology SSO Server for Wiki.js

[Frixs]

Hello,
I would like to make available the SSO option to my Synology NAS.

I run Portainer on my Synology NAS in which my WIki.js lives.
On the same Synology NAS, I would like to make an SSO Server for my WIki.js, so Synology users can simply log into my WIki.js.
I run everything in my local network only.

On the Synology side, I use OIDC like so:


For the redirect URI I use the one provided on the WIki.js side from the Configuration Reference tab.


This is Well-Known URL content provided:

This is my SSO setting on the Wiki.js side:

It seems to work on the Synology side:

However, on the Wiki.js, I cannot sign in properly:
On the first login try, I always get this:

When I am already logged in to the Synology NAS account in my browser (press F5), this is the issue:

Has anyone tried to connect Wiki.js with Synology NAS? Any help? I appreciate any kind of guidance/help.
The WIki.js uses email to log in while Synology uses a username., not sure if this can be an issue. I guess not, but I am starting to be helpless.

The "testuser" is pre-created by me in the WIki.js with the same email (as he has in Synology) and set to Generic OIDC / OAuth2 provider.

[Frixs]

SOLVED
If anyone runs into this, I found a fix. SSL was the trouble maker here.
It is important to keep either HTTP or HTTPS, but do not mix it (no matter what it suggests to you).

[SmolSoftBoi]

Some of these settings appear to have changed in the last year, could you share your working settings please? I'm trying to accomplish the same thing.