error after upgrade to vb2 pl2

[betterthanyours]

I clicked the language option on the tools.php and nothing happened, the same error.

I restored the SQL last night, and did the upgrade again. This time the error is different

Warning: require_once([path]/vault/class/friendlyurl.php) [function.require-once]: failed to open stream: No such file or directory in [path]/includes/class_friendly_url.php(287) : eval()'d code on line 1

Fatal error: require_once() [function.require]: Failed opening required '/home/unrealkl/public_html/vault/class/friendlyurl.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/unrealkl/public_html/includes/class_friendly_url.php(287) : eval()'d code on line 1

What do I do here?