I just self practice up to HERE , then no data is loaded
https://docs.dhtmlx.com/tutorials__first_app__step6.html
if i direct run the contacts.php (http://localhost:8080/dhtmlx/contact_manager/data/contacts.php)
and it show me this error below
SQLSTATE[HY000] [2002] No connection could be made because the target machine actively refused it.
can anyone please help me? thanks