Fatal Error upon WP Update to 3.9.3

Hey guys,

my website auto-updated, and it seems there is a fatal error on the site now:

Warning: require() [function.require]: Unable to access /home/wgibbs/public_html/wp-includes/version.php in /home/wgibbs/public_html/wp-settings.php on line 30

Warning: require(/home/wgibbs/public_html/wp-includes/version.php) [function.require]: failed to open stream: No such file or directory in /home/wgibbs/public_html/wp-settings.php on line 30

Fatal error: require() [function.require]: Failed opening required ‘/home/wgibbs/public_html/wp-includes/version.php’ (include_path=’.:/usr/lib/php’) in /home/wgibbs/public_html/wp-settings.php on line 30

Line 30 reads:

require( ABSPATH . WPINC . ‘/version.php’ );

No clue where to begin, your help is appreciated!