ORA-12154: TNS:could not resolve the connect identifier specified

In the environment variables, I added the following:

FORMS_BUILDER_CLASSPATH
C:\ORACLE_FORMS_12C_HOME\bin\frmbld.exe;
C:\ORACLE_FORMS_12C_HOME\forms\java\frmall.jar

FORMS_PATH
C:\ORACLE_FORMS_12C_HOME\forms\java\frmall.jar;
C:\ORACLE_FORMS_12C_HOME\forms\java\FRMWEBUTIL.JAR

TNSNAMES.ORA FILE 

# tnsnames.ora Network Configuration File: C:\ORACLE_12C_DATABASE\product\12.1.0\dbhome_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

LISTENER_ORCL =
  (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))


ORCL =
  (DESCRIPTION =
    # (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
     (ADDRESS = (PROTOCOL = TCP)(HOST = Window10PRO)(PORT = 1521))
    (CONNECT_DATA =                      
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )


ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
    )
  )

********************************************************************************************
SQLNET.ORA FILE

# sqlnet.ora Network Configuration File: C:\ORACLE_12C_DATABASE\product\12.1.0\dbhome_1\network\admin\sqlnet.ora
# Generated by Oracle configuration tools.

# This file is actually generated by netca. But if customers choose to 
# install "Software Only", this file wont exist and without the native 
# authentication, they will not be able to connect to the database on NT.

SQLNET.AUTHENTICATION_SERVICES= (NTS)

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
********************************************************************************************


LISTENER.ORA FILE

# listener.ora Network Configuration File: C:\ORACLE_12C_DATABASE\product\12.1.0\dbhome_1\network\admin\listener.ora
# Generated by Oracle configuration tools.


SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = C:\ORACLE_12C_DATABASE\product\12.1.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:C:\ORACLE_12C_DATABASE\product\12.1.0\dbhome_1\bin\oraclr12.dll")
    )
  )



LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
                (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
         (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )


 ********************************************************************************************
LISTENER RESULTS

C:\WINDOWS\system32>LSNRCTL STATUS

LSNRCTL for 64-bit Windows: Version 12.1.0.2.0 - Production on 09-MAR-2019 11:42:09

Copyright (c) 1991, 2014, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for 64-bit Windows: Version 12.1.0.2.0 - Production
Start Date                08-MAR-2019 17:04:16
Uptime                    0 days 18 hr. 38 min. 8 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   C:\ORACLE_12C_DATABASE\product\12.1.0\dbhome_1\network\admin\listener.ora
Listener Log File         C:\ORACLE_12C_DATABASE\diag\tnslsnr\Window10PRO\listener\alert\log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=Window10PRO)(PORT=5500))(Security=(my_wallet_directory=C:\ORACLE_12C_DATABASE\admin\orcl\xdb_wallet))(Presentation=HTTP)(Session=RAW))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
  Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "orcl" has 1 instance(s).
  Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orclXDB" has 1 instance(s).
  Instance "orcl", status READY, has 1 handler(s) for this service...
Service "pdborcl" has 1 instance(s).
  Instance "orcl", status READY, has 1 handler(s) for this service...
The command completed successfully

C:\WINDOWS\system32>