Connection failed:SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: YES)

Fatal error:  Uncaught Error: Call to a member function close() on null in /code/h5/releases/1/application/controllers/Base.php:99
Stack trace:
#0 [internal function]: BaseController->__destruct()
#1 {main}
  thrown in /code/h5/releases/1/application/controllers/Base.php on line 99