Fatal error: Class 'CAdminUiList' not found in?

Question

1C-Bitrix

In the admin panel, when I try to view the list of information blocks, I get the error Fatal error: Class 'CAdminUiList' not found in C:\OSPanel\domains\zionec\bitrix\modules\iblock\admin\iblock_admin.php on line 21
What could be the problem? I sin on viruses.

Answer 1

zionec is that studio)) CModule::AddAutoloadClasses(