I just updated a forum, the problem is solved. The plugins are listed. But have another problem, but will open a separate thread for it.
Admin Panel > Plugin > Advanced not linked
In the past we could access the admin page to read the Node.js error logs, check the database version etc. However that link is not working anymore. I guess it was as Plugins > Advanced, but on click on Advanced nothing happens ..
What happens when you go to /admin/advanced/database directly? It is working fine on this forum.