Help about permissions, Secondary Group and Sub-Forums

[DSystem]

Hello!

I have some sub-forums that grant access to members by adding them to a secondary group.

It works perfectly users who are in this secondary group can view and create topics in these sub-forums normally.

The problem is that these users can not search in these sub-forums.

What do I have to do so that these users can do searches in the sub-forums that have access?