Site Admin users cannot create new individuals via the GUI

As reported by Georgy on Slack:

To reproduce, create a user with Site Admin role.  Go to the Site Admin page, click "Add individual of this class" button.  User is returned to home page with alert message that it does not have permission to do that action.

Log shows the following and similar:

[PermissionsPolicy] No permission will approve AddObjectPropertyStatement: <null> <null> <?SOME_URI>