How I solved an issue I had ("Error. Check Permissions")

[ajshell1]

I'll keep this short. I had an error when I was trying to connect Authelia to Jellyfin. After granting permission on Authelia, it would just return "Error. Check Permissions".

This was in my log:

[13:00:43] [WRN] [17] Jellyfin.Plugin.SSO_Auth.Api.SSOController: OpenID user f1c703c6-39c1-4536-bb8f-1f0319587a9f has one or more incorrect role claims: [{"Type": "amr", "Value": "pwd"}, {"Type": "amr", "Value": "kba"}, {"Type": "amr", "Value": "otp"}, {"Type": "amr", "Value": "mfa"}, {"Type": "azp", "Value": "jellyfin"}, {"Type": "jti", "Value": "f7e5192b-8c77-4d2c-a383-0e71b2f7270a"}, {"Type": "sub", "Value": "f1c703c6-39c1-4536-bb8f-1f0319587a9f"}, {"Type": "groups", "Value": "admins"}, {"Type": "groups", "Value": "dev"}, {"Type": "name", "Value": "AJ"}, {"Type": "preferred_username", "Value": "ajshell1"}, {"Type": "rat", "Value": "1751907635"}, {"Type": "updated_at", "Value": "1751907642"}]. Expected any one of: ["jellyfin-users"]

It turns out that you have to add your Authelia user to the jellyfin-users and/or jellyfin-admins group in Authelia's users.yml file (or however else you have it set up).