Solution: Enable Archive Log
How to Enable Archive Log
Solution: 
At the end of the installation, the system prompts us to restart the server; we click OK.
After restarting the server, the Oracle archive log must be activated as follows:
Commands:
sqlplus sys/pwdOracle@opera as sysdba
shutdown immediate;
Startup mount;
Alter database archivelog ;
Alter database open;
Archive log list;