SQL developer error

[sukruthytolasi27]

Status : Failure -Test failed: IO Error: The Network Adapter could not establish the connection (CONNECTION_ID=oWuCfqNARQisblL03knVjw==)

What product/components do you use and which version/fix level are you on?

Is your question related to the free trial, or to a production (customer) instance?

What are you trying to achieve? Please describe it in detail.

trying to connect to database

Do you get any error messages? Please provide a full error message screenshot and log file.

Have you installed all the latest fixes for the products and systems you are using?

[shashi.kantofficial0101]

Open SQL plus and create user after that the error will be out.
In SQL plus type " alter session set container=“XEPDB1” "
create username webmuser identified by admin123;
Your user will be created and then grant permission.
“Grant all privileges to webmuser”.

Then go wo SQL developer and try it.