If Blackbaud hosts your data:
Contact Support and reference this article. 

If you host your database locally, complete the steps in the order listed below until the issue is resolved:

1. Browse to the server's Deploy folder, open ISSetupPrerequisites, install Microsoft XML4 Components and Visual Basic for Applications Version 2627.01

2. Repair The Education Edge on the Web server.

3. If using Windows only authentication in SQL Server, then configure web.config for Integrated Windows authentication.