Refactor components for better readability

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

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

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

No files, tests, or entry points are named. Start by locating the configuration handling and existing error-message paths, then determine the affected scope before changing anything; done means configuration failures provide more descriptive messages and the relevant behavior is covered by tests.

Written by the indexing model from the issue text.