Handle edge cases in analytics

**Problem**
When working with data, 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 analytics-related data handling and existing error messages in the repository; no file, test, or entry point is named. Define which edge cases need coverage and update the messages so failures provide more debugging context, then verify the relevant analytics behavior with tests.

Written by the indexing model from the issue text.