Handle edge cases in pagination

**Problem**
When working with store, 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 store pagination code and its current error paths. Clarify which pagination edge cases are in scope, then improve the related error messages; done means the affected failures provide detailed, useful debugging information.

Written by the indexing model from the issue text.