Thanks @mudit-kumawat. I would add this, as admin users will still show the admin bar, so with your code we will have two divs with the same id:
// Add adminbar blank div to fix BBPRESS jQuery issue
function add_admin_bar_div() {
if( is_bbpress() && ! current_user_can('administrator') ){
echo '<div id="wpadminbar" style="display:none;"></div>';
}
}
add_action('wp_footer', 'add_admin_bar_div',15);
6 months and the error still there. WP 4.9.8 and BBPress 2.5.14
Is there a github repo to make a pull request?