An uncaught Exception was encountered 遇到未捕获的异常

An uncaught Exception was encountered

Type: Error

Message: Call to a member function query() on null

Filename: C:\Users\Administrator\Desktop\mola\shuaijin\dayrui\models\Mform_model.php

Line Number: 126

Backtrace:

File: C:\Users\Administrator\Desktop\mola\shuaijin\dayrui\controllers\admin\Mform.php
                   Line: 55
                   Function: add

File: C:\Users\Administrator\Desktop\mola\shuaijin\Init.php
                   Line: 153
                   Function: require

File: C:\Users\Administrator\Desktop\mola\index.php
                   Line: 24
                   Function: require

File: C:\Users\Administrator\Desktop\mola\shuaijin.php
                   Line: 8
                   Function: require