Update core documentation

**Problem**
When working with components, 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 component error-handling paths and the core documentation, then determine which errors need more detail. Done means the requested error messages are more descriptive and the related documentation is updated, with tests or verification identified during investigation.

Written by the indexing model from the issue text.