bbPress.org

What version of bbPress did you try to install?

I’ve seen it before but I’ve figured out why it happens.

http://www.google.com/search?q=site%3Abbpress.org%2Fforums+%22Key+master+could+not+be+created!%22

https://bbpress.org/forums/topic/bbpress-10-alpha-4-released/page/3

This was related to PHP4:

https://bbpress.org/forums/topic/basic-integration-screencast#post-22363