After installing the plugin and view the topics, found in the Error Console

Error: TypeError: $(...).on is not a function
Source: /wp-content/plugins/bbpress/templates/default/js/topic.js?ver=2.3.2
Line: 22

Fixed bug with changing the .on to .live at line 22 and 27

[@johnjamesjacoby Keymaster 11 years, 8 months ago]

From http://api.jquery.com/live/ :

As of jQuery 1.7, the .live() method is deprecated. Use .on() to attach event handlers. Users of older versions of jQuery should use .delegate() in preference to .live().

Sounds like you’re using an old jQuery version, being enqueued from some other plugin.

[@axeleus Participant 11 years, 8 months ago]

Almost all of the plugins that I use, I write myself. I Use jQuery 1.8.3. But there was a problem.