Redhat sso after deletion of Master-realm client in master Realm, rdsso admin login (/auth/admin/master/console/) is blank.
And in the rdsso server log, we can see this Error
ERROR [org.keycloak.services.error.KeycloakErrorHandler] (default task-10971) Uncaught server error: java.lang.NullPointerException
Since the redsso background is live, we are not trying to troubleshoot more.
Note: We just deleted 1 master-realm client out of 70 and this has messed up our admin login console.
In Keycloak, the "realmname-realm" in the master realm (including 'master-realm') clients are essential for the operation of the admin console. Deleting them will result in the admin console not being operational, as you have noticed. The fix is restoring the client back to its previous state, probably best done through a database restore.