error ORA-12514 TNS:listener does not currently know of service requested in connect descriptor

Question

Currently, I'm facing the error "ORA-12514 TNS:listener does not currently know of service requested in connect descriptor" when trying to login on my front end. Every solution I've seen so far was to change the service_name on tnsnames.ora, but I've checked on my command line and the service name is correct. Yesterday, this was working fine, but I've encountered this issue before (I think my previous fix was to change the host name, but that is already correct this time). Since I'm new to this, I don't fully know what other data I should be providing but let me know if any further info is needed.

Thank you :)

This is my tnsnames.ora.

# tnsnames.ora Network Configuration File: C:\oracle\NETWORK\ADMIN\tnsnames.ora
# Generated by Oracle configuration tools.

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


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

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

And my listener.ora:

# listener.ora Network Configuration File: C:\oracle\NETWORK\ADMIN\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = C:\oracle)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:C:\oracle\bin\oraclr19.dll")
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = PROLTPE15G4PS.Home)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )