Hi Michiel,
thanks for helping on this. I have attached various screenshots. I had done the steps you raised. I think the key point is that even the resource package for chapter 2 shows the same problem.
Event handler on teammember entity.
Save button on TeamMember_New_administrator
BCO_TeamMember_CheckUserRoleSelection.
I added some show messages. These show what I would expect. BCO_TeamMember_CheckUserRoleSelection