Improve error messages in types

**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.

Start by locating the configuration type definitions and the existing error-handling paths in the repository; the issue does not name specific files or tests. Review current messages and determine which configuration failures need more context. Done means the relevant errors provide descriptive debugging information and the existing checks still pass.

Written by the indexing model from the issue text.