You need to try and make the following changes which should enable the forum to work OK but you will also need to check the rest of your site as I can not test that of course. But we should be able to resolve things if there are any further issues.

The file you need to edit is: /core/inits/init_sidebar_ui.php

At the very top you will find this code:

add_action('wp_footer', 'sidebarui_js');
function sidebarui_js(){
    wp_register_script('accordion', CORE_JS.'/jquery-ui.custom.js', 'jquery', '1.0', true);
    wp_print_scripts('accordion');
}

Try changing that block to the following code please:

add_action('wp_footer', 'sidebarui_js');
function sidebarui_js(){
//    wp_register_script('accordion', CORE_JS.'/jquery-ui.custom.js', 'jquery', '1.0', true);
//    wp_print_scripts('accordion');
    wp_enqueue_script('jquery-ui-core');
    wp_enqueue_script('jquery-ui-accordion');
    wp_enqueue_script('jquery-ui-draggable');
    wp_enqueue_script('jquery-ui-sortable');
}

and then test of course!

Works like a charm! Thanks guys for all the help! Time to add a couple of the plugins and change the stylesheets etc. 😀

excellent! As I say – just watch the rest of the site. The code we changed controls some sort of accordion feature/drag and sort feature? on the sidebar (apparently) so just make sure that is still working and if so – then we are good.