ORA-28353：failed to open wallet

错误原因：The database was unable to open the security module wallet due to an incorrect wallet path or password. It is also possible that a wallet had not been created. Type mkwallet from command line for instructions. If the database is configured to use Oracle Key Vault as the TDE keystore, the database may be having difficulty finding the Oracle Key Vault configuration file. If Oracle Key Vault is used as the keystore, check if the Oracle Key Vault configuration file is in the right directory. When the instance initialization parameter WALLET_ROOT is configured, Oracle Key Vault configuration file should be located at the following paths $WALLET_ROOT/okv/conf for CDB$ROOT and $WALLET_ROOT/PDB-GUID/okv/conf for a pluggable database (PDB) in isolated mode. The PDB GUID can be obtained by querying GUID from DBA_PDBS view. When WALLET_ROOT is not set, Oracle Key Vault configuration file should be under $OKV_HOME/conf.