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將原先完好的網站移植到群暉nas上之后運行報錯，請問怎么解決？

An uncaught Exception was encountered

Type: Error

Message: Call to a member function real_escape_string() on boolean

Filename: /volume1/web/www/perfectfont/diy/system/database/drivers/mysqli/mysqli_driver.php

Line Number: 391

Backtrace:

File: /volume1/web/www/perfectfont/diy/poscms/model/Member.php
Line: 341
Function: where

File: /volume1/web/www/perfectfont/diy/dayrui/controllers/admin/Login.php
Line: 36
Function: admin_login

File: /volume1/web/www/perfectfont/diy/Init.php
Line: 99
Function: require

File: /volume1/web/www/perfectfont/index.php
Line: 49
Function: require

File: /volume1/web/www/perfectfont/admin.php
Line: 8
Function: require