ERROR 256: DB connection error in PGV_DB::createInstance(): SQLSTATE[HY000] [2005] Unknown server host 'mysql' (-2)

Fatal error: DB connection error in PGV_DB::createInstance(): SQLSTATE[HY000] [2005] Unknown server host 'mysql' (-2) in /home/innova/ged.innovagroup.ca/includes/classes/class_pgv_db.php on line 405