Slight.error [0]: Undefined constant "Controller\confpage"

Class:Error

Error at [ line:91]: /app/Controller/ErrorController.php

Included files [21]:
1./app/public/index.php
2./lib/Slight/bootstrap.php
3./lib/Slight/Kernel/App.php
4./lib/Slight/Kernel/ExceptionHandler.php
5./lib/Slight/Http/Router.php
6./app/Conf/routes.php
7./app/Controller/ErrorController.php
8./app/Controller/TemplateController.php
9./lib/Slight/Container/Controller.php
10./app/Model/CommonModel.php
11./lib/Slight/Model/Model.php
12./app/Conf/db.php
13./lib/Slight/Model/DBMySQLi.php
14./app/Model/UserModel.php
15./lib/Slight/View/View.php
16./app/Conf/confsite.php
17./app/Conf/confpage.php
18./app/View1/menu/menu1.php
19./app/View1/menu/menu2.php
20./app/View1/header/header1.php
21./app/View1/footer/footer1.php