Welcome to Elxis CMS tarzan_desa,
This issue caused because you haven't choose the database from the Internet Server side.
- Create a database
- Create a user and give all the privileges to the above database.
Here is a video presentation of the 2 steps above using cPanel : https://www.youtube.com/watch?v=nfM0xNwkAMA
- Go to Phpmyadmin tool
- Select the database and click the tab 'Import'
- Upload the *.sql file which exported from your local test server and click 'ok'.