The analytics report Note Activity (and I assume all the rest) includes Clients in the default display of results. This is fine, but Client is not a role type included in the User Role list - it would make the most sense to:
1. Exclude Clients from the default list of users displayed and give the report user the option to include that role.
2. Alternatively, include Clients in the Role list so that they can choose to include or look at just those user roles.