Refactor components for better readability

**Problem**
When working with data, the error messages could be more descriptive.

**Suggestion**
Improve error handling and add detailed error messages.

**Context**
This would help with debugging and maintenance.

The issue names no files, tests, or entry points, so first locate the components responsible for data-related error handling and read their existing tests. Done means the relevant errors provide more descriptive messages and the updated error-handling behavior is covered by tests.

Written by the indexing model from the issue text.