The 7 theme cause wordpress error

Strange when I try to open my site today, there is a error message ‘There has been a critical error on this website.’ Then I received an email from wordpress. It says WordPress caught an error with your theme, The7. Below is the error details. Does anyone know how to resolve it?

Error Details

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An error of type E_COMPILE_ERROR was caused in line 67 of the file /home/quadalar/public_html/wp-content/themes/dt-the7/inc/init.php. Error message: require_once(): Failed opening required ‘/home/quadalar/public_html/wp-content/themes/dt-the7/inc/extensions/less-vars/less-functions.php’ (include_path=‘.:/opt/alt/php74/usr/share/pear’)

Hi,

Contact with your purchase item author @Dream-Theme hope they will helped!

Thanks!