If you are using wpForo 2.x then you should use addons 3.x

If wpForo is 1.9.x, the addons must NOT be 3.x only lower versions.

Few... It worked, thanks!

I don't get you.

Should I update Wpforo BEFORE updating advanced attachments addon (v 3.0.1)?

Please my messages below.

update wpForo to 2.x and then activate the addons(their version should be 3.x)

I let the other three addons (Embed/Polls/Private messages) in 3.0.0 version, and my Wpforo plugin is still in 1.9.9.2.

But I suppose this is not a good solution?

What should I do now?...

I tried to suppress this addon and reinstall it, but the same issue came back!

please check this FAQ Topic: https://wpforo.com/community/faq/instruction-to-update-to-wpforo-2-0-solutions-for-auto-update-problems/#post-68095

I followed your instructions and updated my four addons to 3.x.x before updating to Wpforo 2.x.

But I can't do this last update, and cannot access anymore to my Wordpress dashboard. The error displayed is :

Fatal error: Uncaught Error: Call to undefined function wpforo_is_module_enabled()
in /home/clients/3a49d058a1babb770daa11d5a8da262a/les-castors/wp-content/plugins/wpforo-advanced-attachments/includes/functions.php on line 21

Pile d’appel :

1. {closure}()
   wp-includes/class-wp-hook.php:307
2. WP_Hook::apply_filters()
   wp-includes/class-wp-hook.php:331
3. WP_Hook::do_action()
   wp-includes/plugin.php:476
4. do_action()
   wp-content/plugins/wpforo/wpf-admin/admin.php:66
5. wpforo_add_menu()
   wp-includes/class-wp-hook.php:307
6. WP_Hook::apply_filters()
   wp-includes/class-wp-hook.php:331
7. WP_Hook::do_action()
   wp-includes/plugin.php:476
8. do_action()
   wp-admin/includes/menu.php:155
9. require_once()
   wp-admin/menu.php:394
10. require()
    wp-admin/admin.php:158
11. require_once()
    wp-admin/index.php:10

Any help please?...