Support notifications configuration

**Problem**
When working with lib, 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 inspecting the error-handling paths under lib and reproduce the current error messages to identify where context is lost. The work is done when relevant errors provide more descriptive, detailed messages that improve debugging and maintenance.

Written by the indexing model from the issue text.