Handle edge cases in pagination

**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.

The issue mentions pagination, parsers, and error messages but names no files, parser entry points, failing cases, or tests. First locate the pagination and parser error-handling paths, then clarify which edge cases and exact diagnostic details are required; it is done when those agreed cases produce descriptive errors and the relevant tests pass.

Written by the indexing model from the issue text.