Handle edge cases in import

**Problem**
When working with parsers, 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 parser import path and tracing how import failures are currently reported. Review the existing error-handling tests, if present, and define done as descriptive messages for the relevant edge cases with coverage demonstrating the new behavior.

Written by the indexing model from the issue text.