Fatal error: Class 'Config' not found, what's the problem?

Question

opencart

Moved opencart website to another hosting. Through FTP flooded the site, imported the database. Everything seemed to be done correctly. But when opening a site on a new domain, it gives an error Fatal error: Class 'Config' not found referring to index.php and line 27 in it.
This part of the code is here:
// Config
$config = new Config(); // HERE
$registry->set('config', $config);

All covered already, please help!

Thanks in advance!

Answer 1

Says he can't find the class. Apparently not all files were copied. You need a system folder, it contains all the classes.