Hello, If you suddenly see at your minions: 2022-03-28 13:19:41,880 [salt.crypt :743 ][ERROR ][15942] Sign-in attempt failed: {'publish_port': 4505, 'pub_key': '-----BEGIN PUBLIC KEY----- \n...\n-----END PUBLIC KEY-----\n''enc': 'pub','sig': ".."} 2022-03-28 13:19:41,885 [salt.minion :1056][ERROR ][15942] Error while bringing up minion for multi-master. Is master at salt-master-server.tf.local responding? That's a consecuence of the fixes for the last Salt CVEs. The official solution is updating to Uyuni 2022.03 If you want to stay on 2022.02, this is an unofficial, untested and unsupported solution: - Apply the updates for the Salt Master on the server - Resync all client tools - Update the salt minon at all salt clients Best regards. -- Julio González Gil Release Engineer, SUSE Manager and Uyuni jgonzalez@suse.com