I don’t have a fix for you but can commiserate. We are at a private that uses Blackbaud for current students and when we joined, they somehow gave my DH access to the financial side of the account and my account can only access the rest (grades, directory, handbook, forms). No matter what we or customer service does, we can’t combine accounts or see more information from our respective accounts. We joke that we should unenroll and reapply to see if we can redo Blackbaud access.
Contact the school. They won’t ding you for something like this, don’t worry. Usually if one person is having an issue, others are too and/or they have a policy that will reveal it to be a non-issue.