Thank you @irisko7,
wpForo is installed on more than 20,000 websites and it works fine. The [add topic] button is a key feature, so without working of this button this plugin would use nobody.
This is definitely a site specific issue. We just checked and see the problem. For some reason wpForo JS files are totally missing in your website footer. Some plugin stops loading of wpforo plugin JS files or this is a result of wrong configuration. We see wpForo page duplications:
https://irisko.me/community/
https://irisko.me/forum/
First please temporarily disable Ezoic Integration plugin to allow us debug the issue. This plugin adds lots of JS codes in unusual places of your website. Once you disable this plugin, we’ll start checking the problem.
Second, please go to Dashboard > Forums > Settings > General Tab, take a scrrenshot of your settings and send it to support[at]gvectors.com email address or attached it in a new support topic in wpForo support forum: https://wpforo.com/community/