Fatal error: Uncaught Error: Call to a Member Function link()

Question

Recently I imported the files from my site to the machine I am currently using and configured the files config.php and admin/config.php and others (utilizo XAMPP).

However, when I try to access the site the following error occurs:

Fatal error: Uncaught Error: Call to a member function link() on null in 
 C:\xampp1\htdocs\shop1\admin\controller\error\not_found.php:16 
Stack trace: 
 #0 C:\xampp1\htdocs\shop1\system\storage\modification\system\engine\action.php(51): 
    ControllerErrorNotFound->index() 
 #1 C:\xampp1\htdocs\shop1\system\engine\front.php(59): 
    Action->execute(Object(Registry)) 
 #2 C:\xampp1\htdocs\shop1\system\engine\front.php(52): 
    Front->execute(Object(Action)) 
 #3 C:\xampp1\htdocs\shop1\system\framework.php(214): 
    Front->dispatch(Object(Action), Object(Action)) 
 #4 C:\xampp1\htdocs\shop1\system\startup.php(124): 
    require_once('C:\\xampp1\\htdoc...') 
 #5 C:\xampp1\htdocs\shop1\index.php(24): 
    start('catalog') 
 #6 {main} thrown in C:\xampp1\htdocs\shop1\admin\controller\error\not_found.php on line 16

Could someone please help me? I need to solve this problem as soon as possible.