ORA-12505 while creating new connection in Oracle SQL Developer - oracle

Question

I installed few moments later the Oracle database XE 18.4.0.0.0 (18c).
Next I downloaded the Oracle SQL Developer tool and I tried to create a new connection, but I'm getting this error:
The master password is correct and the listerner is running, (UPDATED after #EdStevens reply):
C:\WINDOWS\system32> lsnrctl start
LSNRCTL for 64-bit Windows: Version 18.0.0.0.0 - Production on 22-OTT-2020 09:04:27
Copyright (c) 1991, 2018, Oracle. All rights reserved.
Avvio di tnslsnr: attendere...
TNSLSNR for 64-bit Windows: Version 18.0.0.0.0 - Production
Il file dei parametri di sistema Þ C:\app\gabri\product\18.0.0\dbhomeXE\network\admin\listener.ora
Ascolto su: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
Connessione a (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=127.0.0.1)(PORT=1521)))
STATO del LISTENER
------------------------
Alias LISTENER
Versione TNSLSNR for 64-bit Windows: Version 18.0.0.0.0 - Production
Data di inizio 22-OTT-2020 09:04:34
Tempo di attivitÓ 0 giorni 0 ore 0 min. 12 sec.
Livello trace off
Sicurezza ON: Local OS Authentication
SNMP OFF
File di parametri listenerC:\app\gabri\product\18.0.0\dbhomeXE\network\admin\listener.ora
Summary table degli endpoint di ascolto...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
Summary table dei servizi...
Il servizio "CLRExtProc" ha 1 istanze.
L'istanza "CLRExtProc", stato UNKNOWN, ha 1 handler per questo servizio...
Il servizio "database" ha 1 istanze.
L'istanza "XE", stato UNKNOWN, ha 1 handler per questo servizio...
Il comando Þ stato eseguito
Here my listener.ora:
# listener.ora Network Configuration File: C:\app\gabri\product\18.0.0\dbhomeXE\NETWORK\ADMIN\listener.ora
# Generated by Oracle configuration tools.
DEFAULT_SERVICE_LISTENER = XE
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = C:\app\gabri\product\18.0.0\dbhomeXE)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:C:\app\gabri\product\18.0.0\dbhomeXE\bin\oraclr18.dll")
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = PortatileGabriele)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
)
And tnsnames.ora:
# tnsnames.ora Network Configuration File: C:\app\gabri\product\18.0.0\dbhomeXE\NETWORK\ADMIN\tnsnames.ora
# Generated by Oracle configuration tools.
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
)
)
I hope that someone can help me!
Thanks in advance
EDIT:
C:\WINDOWS\system32>echo %ORACLE_HOMEd%
%ORACLE_HOMEd%
C:\WINDOWS\system32>echo %ORACLE_SID%
%ORACLE_SID%
C:\WINDOWS\system32>sqlplus / as sysdba'
SQL*Plus: Release 18.0.0.0.0 - Production on Gio Ott 22 14:27:19 2020
Version 18.4.0.0.0
Copyright (c) 1982, 2018, Oracle. All rights reserved.
ERROR:
ORA-12560: TNS: errore dell'adattatore del protocollo
Immettere il nome utente: SYSTEM
Immettere la password:
ERROR:
ORA-12560: TNS: errore dell'adattatore del protocollo
Immettere il nome utente:

Answer 1

First, the error 'listener does not know of sid' is absolutley correct. We see from 'lsnrctl status' that no database is registered with the listener. So until you get a database actually started and registered with the listener, nothing else matters.
Second, once you do get a database running, your SQL Dev 'connection type' of 'basic' means you are supplying all necessary connection info directly, and tnsnames.ora is not called into play. NOthing wrong with that, but if you do want to use tnsnames, then change your connection type to 'tns'. The necessary input fields with change accordingly.
Third, as mentioned, whether you use tns or basic connection, you want to specify service name, not sid.