This code is fairly recently merged, what version of LibreNMS are you using?
( You would need at least 23.11.0 with this this patch applied - Add support for Okta Group claims to set Roles by peejaychilds · Pull Request #15592 · librenms/librenms · GitHub )
The setting should look something like this …
You could post the output of
lnms config:get auth.socialite
with sensitive things removed which might show what the issue with the ‘extra provider’ is