I am having this problem too. It looks like reply.js isn’t getting enqueued because bbp_is_single_topic is false.
/wp-content/plugins/bbpress/templates/default/bbpress-functions.php
if ( bbp_is_single_topic() ) {
…
// Hierarchical replies
if ( bbp_thread_replies() ) {
$scripts[‘bbpress-reply’] = array(
‘file’ => ‘js/reply.js’,
‘dependencies’ => array( ‘jquery’ )
This should be bbpress functionality, but I’m unsure how to fix this. Also, I checked the permission, and it looks okay.