Hi, i got this error on my Wordpress blog:

Warning: require(/home/*/public_html/wp-includes/functions.php) [function.require]: failed to open stream: No such file or directory in /home/englishb/public_html/wp-settings.php on line 69

Fatal error: require() [function.require]: Failed opening required '/home/*/public_html/wp-includes/functions.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/*/public_html/wp-settings.php on line 69
Anyone please have idea why this appears?

//EDIT: I found that file /wp-includes/functions.php is missing, so i uploaded one from wordpress default script downloaded from wordpress.org

So this error means that required file (functions.php) was not found.