Getting this error after moving site

Okay, a client of mine moved his site. The server he was an old one using a lower version of php and he had to move it to their new server. He did forget to backup his db, so I had to retrieve it and finally got that successfully uploaded.

But now he is getting this error

Warning: require(/hsphere/local/home/peak0car/peak-careers.com/wp-includes/pomo/mo.php): failed to open stream: No such file or directory in /hsphere/local/home/peak0car/peak-careers.com/wp-settings.php on line 83 Fatal error: require(): Failed opening required ‘/hsphere/local/home/peak0car/peak-careers.com/wp-includes/pomo/mo.php’ (include_path=’.:/hsphere/shared/apache/libexec/php5ext/php/’) in /hsphere/local/home/peak0car/peak-careers.com/wp-settings.php on line 83

Any help would be much appreicated.