Blocked listener service

It seems that I cannot connect via tns alias on my auxiliary, I know I could bypass it by either connection locally with auxiliary e.g. auxiliary / or adding a (UR=A) parameter. The DB is in nomount. I want to know why, because I have explicitly created two static listener registrations, to use it for the dataguard and for the duplicate, but I have following issue. Here is firstly the configuration. listner.ora [oracle@server-salzburg admin]$ cat /u01/app/19/grid/network/admin/listener.ora #Backup file is /u01/app/oracle/crsdata/server-salzburg/output/listener.ora.bak.server-salzburg.oracle line added by Agent # listener.ora Network Configuration File: /u01/app/19/grid/network/admin/listener.ora # Generated by Oracle configuration tools. LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = server-salzburg)(PORT = 1521)) (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521)) ) ) SID_LIST_LISTENER= (SID_LIST= (SID_DESC= (GLOBAL_DBNAME=graz_DGMGRL) (SID_NAME=graz) (ORACLE_HOME=/u01/app/oracle/product/19/dbhome_1) ) (SID_DESC= (GLOBAL_DBNAME=salzburg_DGMGRL) (SID_NAME=salzburg) (ORACLE_HOME=/u01/app/oracle/product/19/dbhome_1) ) ) ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER=ON # line added by Agent VALID_NODE_CHECKING_REGISTRATION_LISTENER=ON # line added by Agent tnsnames.ora [oracle@server-salzburg admin]$ cat tnsnames.ora SALZBURG = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = server-salzburg)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = salzburg) ) ) graz_DGMGRL = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = server-graz)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = graz) ) ) salzburg_DGMGRL = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = server-salzburg)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = salzburg) ) ) listener output [oracle@server-salzburg admin]$ lsnrctl status LSNRCTL for Linux: Version 19.0.0.0.0 - Production on 09-JUN-2025 20:27:36 Copyright (c) 1991, 2019, Oracle. All rights reserved. Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521)) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 19.0.0.0.0 - Production Start Date 09-JUN-2025 20:24:03 Uptime 0 days 0 hr. 3 min. 33 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /u01/app/19/grid/network/admin/listener.ora Listener Log File /u01/app/oracle/diag/tnslsnr/server-salzburg/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=server-salzburg)(PORT=1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Services Summary... Service "+ASM" has 1 instance(s). Instance "+ASM", status READY, has 1 handler(s) for this service... Service "+ASM_DG_DATA" has 1 instance(s). Instance "+ASM", status READY, has 1 handler(s) for this service... Service "+ASM_DG_FRA" has 1 instance(s). Instance "+ASM", status READY, has 1 handler(s) for this service... Service "graz_DGMGRL" has 1 instance(s). Instance "graz", status UNKNOWN, has 1 handler(s) for this service... Service "salzburg" has 1 instance(s). Instance "salzburg", status BLOCKED, has 1 handler(s) for this service... Service "salzburg_DGMGRL" has 1 instance(s). Instance "salzburg", status UNKNOWN, has 1 handler(s) for this service... The command completed successfully rman error: [oracle@server-salzburg admin]$ rman target sys/*******@graz_DGMGRL auxiliary sys/******@salzburg_DGMGRL Recovery Manager: Release 19.0.0.0.0 - Production on Mon Jun 9 20:28:00 2025 Version 19.3.0.0.0 Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved. connected to target database: GRAZ (DBID=3282927897) RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-00554: initialization of internal recovery manager package failed RMAN-04006: error from auxiliary database: ORA-12528: TNS:listener: all appropriate instances are blocking new connections