Support notifications configuration

**Problem**
When working with services, 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 names no files, tests, or entry points. Start by locating notification configuration and the service error-handling paths, then clarify which errors need descriptive messages and what notification behavior is expected before implementing and testing the agreed scope.

Written by the indexing model from the issue text.