ORA-28354
Tried to open the password-protected wallet, but it failed with ORA-28354.
SQL> administer key management set keystore open identified by welcome1 container=all;
administer key management set keystore open identified by welcome1 container=all
*
ERROR at line 1:
ORA-28354: Encryption wallet, auto login wallet, or HSM is already open
ORA-28354 means that the wallet is already open, most likely, it's the auto-login one, there's no need to open it again. You can operate on the wallet now.
If the keystore you want to open is the password-protected one, you can force it open by skipping auto-login keystore.
SQL> administer key management set keystore open force keystore identified by welcome1 container=all;
keystore altered.
If the auto-login keystore were still annoying you, you can try to remove auto-login keystore from wallet completely, then open it again.