Caught Exception: SqlException

Message:
database connection failed!
Created in file /home/agora/public_html/GL/lib/database/SqlDatabaseManager.class.php on line 68.

Stack Trace:
#0 /home/agora/public_html/protected/Configuration.php(196): SqlDatabaseManager->__construct('mysqli://agora_...', false)
#1 /home/agora/public_html/GL/lib/http/HttpRequest.class.php(434): Configuration::getSql()
#2 /home/agora/public_html/GL/lib/http/HttpRequest.class.php(39): HttpRequest->getAuctions()
#3 /home/agora/public_html/index.php(50): HttpRequest->configure()
#4 {main}
3.
In file /home/agora/public_html/protected/Configuration.php line 196.
Method: SqlDatabaseManager->__construct([$connectionString FILTERED], [$debug FILTERED])
2.
In file /home/agora/public_html/GL/lib/http/HttpRequest.class.php line 434.
Method: Configuration::getSql()
1.
In file /home/agora/public_html/GL/lib/http/HttpRequest.class.php line 39.
Method: HttpRequest->getAuctions()
0.
In file /home/agora/public_html/index.php line 50.
Method: HttpRequest->configure()