A PHP Error was encountered

Severity: Notice

Message: Trying to get property 'dateadd' of non-object

Filename: inc/daotao.php

Line Number: 16

Backtrace:

File: /var/www/vhosts/quanlyluhanh.vn/httpdocs/templates/full/2018/inc/daotao.php
Line: 16
Function: _error_handler

File: /var/www/vhosts/quanlyluhanh.vn/httpdocs/templates/full/2018/home.php
Line: 82
Function: view

File: /var/www/vhosts/quanlyluhanh.vn/httpdocs/templates/index.php
Line: 2
Function: view

File: /var/www/vhosts/quanlyluhanh.vn/httpdocs/web/application/controllers/News.php
Line: 367
Function: view

File: /var/www/vhosts/quanlyluhanh.vn/httpdocs/web/application/controllers/News.php
Line: 255
Function: loadView

File: /var/www/vhosts/quanlyluhanh.vn/httpdocs/index.php
Line: 315
Function: require_once