I assume, you got confused.You would need EU3 registered to access the bug forum.
I am talking about Cities in Motion, and I have it registered.
I'm able to view and see threads in that modding forum. Forum permissions should be fine in there.
Beforehand, I could see the sub forum but it was private and there was nothing in it, but now, when I am on the Cities in Motion forum I can see only the Tech Support sub forum.Should be sorted now.
The modding forum is not there anymore.