I have this problem too, the menu is missing from the forum, so when in a topic there is no menu showing to go back to the Forum index.
I do not know how to do coding, there must be a simple answer for this.
I have the bb style pack installed and have been over all settings and cannot find aything to fix this.
I have been using the bbpstyle pack since I started the forum 2 years ago.
The problem is that when when we are in a topic and have been reading or making comments, there is now way to get back to the forum main page which lists all the forums, I have 3 forums and each forum has many sub forums.
The only way back to the forum main page is by using the website main menu, this never used to be a problem, we did have a forum home link/button but I cannot find it now. I have been through the bbstyle pack settings over and over and cannot find a way to have a link back. I have also done a full reset of everything and that did not help either.