Authenticator Callback - Cannot invoke "javax.servlet.http.HttpSession.getId()" because "httpSession" is null

I think, it is an issue with xwiki (core) https://www.xwiki.org/xwiki/bin/view/Documentation/AdminGuide/Configuration/#HTrusteddomains configurations and not the extension. I set the Kecloak domain in the configuration, but it seems to be ignored.
The Browser log shows: "Cookie “JSESSIONID” with the “SameSite” attribute value “Lax” or “Strict” was omitted because of a cross-site redirect."

Many thanks for your support.