A PHP Error was encountered

Severity: Notice

Message: Trying to get property of non-object

Filename: controllers/Course.php

Line Number: 50

Backtrace:

File: /var/www/newxc/newxc2021/home/controllers/Course.php
Line: 50
Function: _error_handler

File: /var/www/newxc/newxc2021/index.php
Line: 317
Function: require_once

_G5牛剑附加考试-学诚国际
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