Half broken wiki logout
Since the upgrade to LemonLDAP::NG 2.0 CORS pre-flight (OPTIONS) Single Log Out requests are denied. (”Regular” Single Log Out requests are not affected.) This affects the wiki, in particular: the first click to “Logout” fails; one has to click a second time to log out from the wiki, and from the wiki it's not possible to sign out from SSO.
(It's a LL::NG issue not a MediaWiki issue, but I'm reporting it against the wiki since AFAICT that's the only place where it manifests at the moment.)
The issue was fixed upstream at https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/1765 , but it's IMHO not atomic enough to backport safely. Better wait until we upgrade the Single Sign On system.