The Data Mapper UI may not fully process complex data maps for Ed-Fi API endpoints such as studentAssessment. During development, we've encountered challenges in deserializing the Swagger/OpenAPI metadata payload and displaying it within the UI as it has a mixture of objects and arrays for child elements like StudentObjectiveAssessments. Upon future implementations, this section (DataFlow.Web.Controllers\DataMapperControllers.cs, etc.) could be enhanced to support complex types. Unit testing to cover various data/use cases is highly recommended.
Until resolved, a recommended workaround of using "Manual Mode" to manually insert data maps for these types.