Here a quick update that all institutional group spaces should be up and running and that you should be added with administrator rights within them. Once your colleagues created user accounts, you can invite them to the group space.
I’d also like to draw your attention to the announcement tab, which you obviously found as you are reading this here. Each PBL group will also have access to one. Under this tab you can post announcements to your PBL group (PBL group members cannot), which will be listed and therefore should be used for important information.
Please have a look around and test it as soon as you have been allocated to a PBL group.