ORA-28365: wallet is not open

Hi Team,

Kindly help for the below issue in oracle 12c--Release 12.1.0.2.0

Kindly let us know how to open wallet,

-bash-3.2$ cat 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)

SQLNET.ALLOWED_LOGON_VERSION=10

SQLNET.ALLOWED_LOGON_VERSION_SERVER=10

SQLNET.ALLOWED_LOGON_VERSION_CLIENT=10

ENCRYPTION_WALLET_LOCATION=

(SOURCE=

  (METHOD=FILE)

   (METHOD_DATA=

    (DIRECTORY=/export/home/oracle/app/product/12.1.0/dbhome_1/admin/ORA12C/wallet)))