Joomla！3.4.5可以'；t输入后端扩展管理器错误500

我无法输入我的joomla！3.4.5不再是后端的扩展管理器
我收到这个错误（带有调试模式信息）：

An error has occurred.
        500 View class not found [class, file]: installerViewinstall, /var/www/vhosts/einserpasch.com/httpdocs/administrator/components/com_installer/views/install/view.html.php
Call stack  
#       Function                                    Location    
1       JApplicationCms->execute()                  /var/www/vhosts/einserpasch.com/httpdocs/administrator/index.php:47 
2       JApplicationAdministrator->doExecute()      /var/www/vhosts/einserpasch.com/httpdocs/libraries/cms/application/cms.php:252  
3       JApplicationAdministrator->dispatch()       /var/www/vhosts/einserpasch.com/httpdocs/libraries/cms/application/administrator.php:152    
4       JComponentHelper::renderComponent()         /var/www/vhosts/einserpasch.com/httpdocs/libraries/cms/application/administrator.php:98 
5       JComponentHelper::executeComponent()        /var/www/vhosts/einserpasch.com/httpdocs/libraries/cms/component/helper.php:372 
6       require_once()                              /var/www/vhosts/einserpasch.com/httpdocs/libraries/cms/component/helper.php:392 
7       JControllerLegacy->execute()                /var/www/vhosts/einserpasch.com/httpdocs/administrator/components/com_installer/installer.php:19    
8       InstallerController->display()              /var/www/vhosts/einserpasch.com/httpdocs/libraries/legacy/controller/legacy.php:728 
9       JControllerLegacy->getView()                /var/www/vhosts/einserpasch.com/httpdocs/administrator/components/com_installer/controller.php:42   
10      JControllerLegacy->createView()             /var/www/vhosts/einserpasch.com/httpdocs/libraries/legacy/controller/legacy.php:863</code>

在此之前，我在安装插件时遇到了一些问题，所以我更改了/httpdocs/libraries/joomla/filesystem/folder.php来自的线路227

$obd = ini_get('open_basedir');

至

//$obd = ini_get('open_basedir');  

之后我可以安装我的插件
我不知道这是否与我的拓展经理的问题有关
但我在folder.php中取消了此编辑，它并没有解决问题。