I’ve tried to contact Lambertus but until now no replies from him.
I can’t edit my posts. It’s because I’m “New Member”? Allow this please.
Now the administration of this forum is in other hands (thanks guys) please fix the issues above (secure connection is already applied). The registration for new members is IMHO the most important one, https://forum.openstreetmap.org/register.php leads to nowhere (if you are not logged in you will see “This forum is not accepting new registrations” which is very unwelcome).
The code for the forum is here: https://github.com/openstreetmap/openstreetmap-forum/tree/openstreetmap Pull requests welcome. 
already working on 