An uncaught Exception was encountered

Type: Error

Message: Call to undefined function sqlsrv_connect()

Filename: /home/site/wwwroot/system/database/drivers/sqlsrv/sqlsrv_driver.php

Line Number: 144

Backtrace:

File: /home/site/wwwroot/application/controllers/Login.php
Line: 24
Function: __construct

File: /home/site/wwwroot/index.php
Line: 315
Function: require_once