It looks like your languages/english/faq.php file was not created successfully upon upgrade.
Confirming that I'm able to duplicate your reported bug -- I just now attempted to view the "Forum Help" (FAQ) page on my test server with an upgrade. It does not display for me either. Though, a fresh install works just fine.
The solution is to copy the faq.php file (mentioned above) from your archive, in to the same directory path on your forum install.
YOURDOMAIN dot com/ ... /languages/english/faq.php