Cannot delete Roles due to "Role Name Lookup" not working

Cannot delete Roles due to "Role Name Lookup" not working

I created a few roles (for only 2 users) that now I want to delete. However the "role name lookup" box does not give me any options to assign the role/users to.

I also want to reassign a user to a lower role I created, but am not given any option to do so. Again the "role name lookup" does not work even though I have created several roles.

Thanks!