wallet issue

I try to create a wallet in the 12c RAC database. We  decide to keep the wallet on each node. Here is the

location in sqlnet.ora

ENCRYPTION_WALLET_LOCATION =

  (SOURCE =

    (METHOD = FILE)

    (METHOD_DATA =

      (DIRECTORY = /u01/app/oracle/admin/wallets/$ORACLE_SID)

    )

  )

SQL> select * from gv$encryption_wallet where inst_id=2;

   INST_ID WRL_TYPE             WRL_PARAMETER                                                STATUS                         WALLET_TYPE          WALLET_OR FULLY_BAC     CON_ID

---------- -------------------- ------------------------------------------------------------ ------------------------------ -------------------- --------- --------- ----------

         2 FILE                 /u01/app/oracle/admin/wallets/FCMSPROD2/                      NOT_AVAILABLE                  UNKNOWN              SINGLE    UNDEFINED          0

SQL> administer key management create keystore '/u01/app/oracle/admin/wallets/FCMSPROD2/'  identified by "wallet";