Error : SQLSTATE[HY000] [1698] Access denied for user 'root'@'localhost'<br />
<b>Fatal error</b>:  Uncaught Error: Call to a member function prepare() on null in /usr/share/nginx/html/platform-demo/scholar/controller/common.php:1511
Stack trace:
#0 /usr/share/nginx/html/platform-demo/scholar/controller/common.php(1550): getSystemDetails()
#1 /usr/share/nginx/html/platform-demo/scholar/config/config.php(144): getDeviceID()
#2 /usr/share/nginx/html/platform-demo/scholar/index.php(2): include('/usr/share/ngin...')
#3 {main}
  thrown in <b>/usr/share/nginx/html/platform-demo/scholar/controller/common.php</b> on line <b>1511</b><br />