MAgento crached.
I get this error:
2018-09-25T11:56:39+00:00 ERR (3): Warning: include(Mage/Core/Model/Resource/Helper/Mysql.php): failed to open stream: No such file or directory in /home/eshopkourt/public_html/lib/Varien/Autoload.php on line 94
2018-09-25T11:56:39+00:00 ERR (3): Warning: include(): Failed opening 'Mage/Core/Model/Resource/Helper/Mysql.php' for inclusion (include_path='/home/eshopkourt/public_html/app/code/local:/home/eshopkourt/public_html/app/code/community:/home/eshopkourt/public_html/app/code/core:/home/eshopkourt/public_html/lib:.:/usr/share/pear:/usr/share/php') in /home/eshopkourt/public_html/lib/Varien/Autoload.php on line 94
Can you help me?