Sso synology configuration (uri?)

Hi there. I would like to use authelia (already ldap connected to my synology ). But I cannot configure my sso server synology .
Without authelia for the moment :
Create the sso server url . sso.domain.com:8843
In domain - sso-open id configuration Put the wellknown url , auth-sso id/client . (what is the uri?)
If Im using homarr as dshboard and create an application into sso server . How should I configure it. Read tutotrial, ans doumentation. But the only thing happened : Can connect to my nas and choose oidc authentification but a litte window appears (the same) and told me : not the same url as the server configuration … Help :working over 2 weeks on this .