Warning: mysqli::mysqli(): (HY000/2003): Can't connect to MySQL server on 'brwnlsupgrd4-11-17.c4pmqdjjh2ow.ap-southeast-2.rds.amazonaws.com' (111) in /home/ec2-user/public_html/system/database/mysqli.php on line 6

Fatal error: Uncaught exception 'ErrorException' with message 'Error: Could not make a database link (2003) Can't connect to MySQL server on 'brwnlsupgrd4-11-17.c4pmqdjjh2ow.ap-southeast-2.rds.amazonaws.com' (111)' in /home/ec2-user/public_html/system/database/mysqli.php:9
Stack trace:
#0 /home/ec2-user/public_html/system/library/db.php(13): DBMySQLi->__construct('brwnlsupgrd4-11...', 'brownellsdbadmi...', 'F1nallyr3st1ng', 'Brownells_Final...')
#1 /home/ec2-user/public_html/index.php(87): DB->__construct('mysqli', 'brwnlsupgrd4-11...', 'brownellsdbadmi...', 'F1nallyr3st1ng', 'Brownells_Final...')
#2 {main}
  thrown in /home/ec2-user/public_html/system/database/mysqli.php on line 9