SQL Developer How Fix issue ? "Status : Failure -Test failed: IO Error: The Network Adapter could not establish the connection"

but when I try to create new databse and connect to it I have problem ...Something is missed in my installation list setups

So, keywords, 'create new database' -

That screen does not CREATE a database. It only allows you to create a connection to an existing database.

So you need to get a database first.

You have some free and easy options, which I talk about here.

Also, can you share your installation setup list, so we can see what you've done? It's possible you DO have a database.

But, seeing you're trying to connect as 'root' - I doubt it. That is an OS user, not an Oracle DB user - which on a new system would be something like 'SYS' or 'SYSTEM.'