If Teachers2Parents told you which contacts are causing the issue then you should be able to fix them yourself by going to the child's profile, clicking the cog next to the contact's name, assigning a value to all their permissions fields and then clicking Save. If they are empty they should glow orange.
Alternatively if there are too many to change manually or if you haven't been told which ones are set to null, you can contact support@scholarpack.com with permission to change the values and we can escalate a technical ticket to make the change from our side.