Hello everyone,
I've just installed oracle database 18c on my windows 10 machine. Then I used Oracle SQL Developer to login to the database that I've created during the installation with connection information below:

The connection was successful and when I tried to open the Tables, it showed an error OCA-01219:

I've found this solution:
https://stackoverflow.com/questions/22940636/ora-01219-database-not-open-queries-allowed-on-fixed-tables-views-only that trying to make the database open.
I have tried this but still no success, my database status:

Can anyone please help to to solve this problem? Thank you very much in advanced and Merry Christmas!